図形ハンター

■ All the Geometry for Junior High, High School, and University Entrance Exams in One App Geometry Hunter is a learning game that focuses solely on problems involving "angles" and "area" of geometric shapes. It covers everything from elementary school entrance exam math (plane and solid geometry) to high school trigonometry, vectors, and integration, all in 65 stages. You can continue using the same app as you advance in grade level. ■ Easy to Read for Elementary School Students – With Furigana (Phonetic Readings) In the junior high school entrance exam level stages and the stories for elementary school students, only kanji learned in the first grade of elementary school are used as is, and **all other kanji have furigana (phonetic readings) above them**. The problem statements are also shortened from "Find ~" to "What is ~?". ■ Three Stories for Each Grade Level • Story (Elementary School): "The Treasure Map" - 23 Steps Total Follow a single map, going from the beach → forest → river → cave → mountain → valley, aiming for the treasure chest at the very back. **One unit is one step on the map.** With each step, a flag is raised, and the **fog** that was hanging ahead clears, revealing the map. Each step involves **finding things yourself by touching with your fingers.** Tearing off the corners of triangles and arranging them in a straight line, rolling a circle and counting three and a half times its diameter, moving water and observing how the depth changes—checking things with your hands before reading formulas. Finally, solving one problem for that unit makes your character on the map walk to the next location. * **Story (Middle School):** "The Measuring Journey" - 21 Chapters Chapter selection isn't via a list, but through a **surveyor's field notebook road map**. You measure the country by following triangulation points, crossing towns, bridges, and towers. Beyond that lies a fog "that hasn't been measured yet," and after completing each chapter, the surveyor walks to the next triangulation point, clearing the fog. The story involves manipulating the map to discover "things that don't change even when moved." A wandering scholar, eager to sell formulas at high prices, is waiting ahead of you, and you can only verify their claims by measuring for yourself. The story progresses chapter by chapter, covering material from elementary school review to middle school. * **Story (High School):** "Orbital Calculation Room" - 9 Chapters This uses a **star chart**. You connect orbits from planet to planet while sending out probes, and finally reach a distant star. The setting is a planet where a colonization ship has just arrived. The landing site, relay tower, communication range, and launch trajectory are determined solely by mathematics. The power of a point theorem, cosine rule, sine rule, radian measure, equation of a circle, and integration are the actual tools used. * Answers for middle and high school students are entered using the same calculator input as in the main game (not multiple choice). Since the questions cannot be answered without calculation, you can also input the equation as is and use "=Calculate". ■ Memorization of answers is not possible. All problems are generated on the spot by the program. Even with the same "angle of the clock hands," the time and answer change each time. There are 30,832 possible combinations of problem statements and answers. There is no problem of "problems that you've solved once not working again." ■ Problems are presented as diagrams. Answers are given as numbers. Each stage consists of three consecutive missions with three hearts. Making a mistake reduces your hearts, and if you reach 0, you restart (the number changes). The remaining hearts become 1 to 3 stars. [Angles - 20 Stages] Angles of Triangles, Parallel Lines and Angles, Isosceles Triangles, Clock Hands, Angles of Polygons, Regular Polygons and Diagonals Boomerang Shape, Folding, Vertically Opposite Angles and Exterior Angles, Parallel Lines and Triangles, Angles of Stars, Inscribed Angle Theorem Circles and Tangents, Arc Ratios and Inscribed Angles, Angles Created by Construction, Five Centers of a Triangle, Trigonometric Equations Angles Between Vectors, Angles Between Two Lines, Angles in Space [Area] [45 Stages] Area of ​​squares and rectangles, area of ​​triangles, various quadrilaterals, circles and sectors, area of ​​roads, compound figures, points inside rectangles, ratio of bases and area ratios, leaf shapes, volume and surface area of ​​solids, nets and assembly (dice rolling, regular polyhedra), water tanks and water levels, movement and overlap of figures, calculating length using similarity, cutting solids, Pythagorean theorem, special right triangles, calculations for sectors, similarity and area ratios, ratio of parallel lines and line segments, similarity ratio and volume ratio, area of ​​a coordinate plane, Hippocrates' Moon, Pyramids and Cones, Pythagorean Theorem in Space, Polyhedra and Euler, Power of a Point Theorem, Ceva and Menelaus' Theorem, Angle Bisectors and Median Theorem, Law of Cosines, Law of Sines and Circumscribed Circle, Area Formulas for Trigonometric Ratios, Heron's Formula, Inscribed and Circumscribed Circles, Vectors and Area, Radian Measure, Distance Between a Point and a Line, Equation of a Circle, Region and Maximum/Minimum Values, Volume of Solid Figures, Spatial Vectors and Planes, Parabolas and Lines (1/6 Formula), Two Parabolas, Comprehensive Area Problems, Solids of Revolution and Curves Each section is arranged in the order of Junior High School Entrance Exam → High School Entrance Exam → University Entrance Exam, and clearing the previous stage unlocks the next. ■ "Challenge 10 Questions" where the solution method itself changes "Challenge 10 Questions" appear in units that have been cleared. The difficulty increases with each question, and not only the numbers but also the solution method itself changes (for example, parallel lines and angles: alternate interior angles → same interior angles → broken lines → zigzag → reverse zigzag). We have prepared 2 to 6 types of solutions per stage, for a total of approximately 245 types. You can earn a crown by solving 10 questions. ■ Nets become 3D shapes on the spot - Net Master This is a mode where you guess "What 3D shape will this net become?" Whether you guess correctly or incorrectly, you can see the net instantly transform into a 3D shape. We want you to see it even when you get it wrong, so it's not designed to only show the transformation when you get it right. There are 101 different nets available. Cube, rectangular prism, triangular prism, quadrilateral prism, pentagonal prism, hexagonal prism, triangular pyramid, square pyramid, pentagonal pyramid, hexagonal pyramid, regular tetrahedron, regular octahedron, cylinder, and cone will appear. Even the same three-dimensional shape can be unfolded in various ways; there are 11 different types of cubes alone. Upon purchase, you'll unlock two sets of 10 puzzles each. "Challenge 10 Problems" randomly selects 10 problems from 101 possibilities, and you must guess which three-dimensional shape each problem will result in. "Applied 10 Problems" presents 10 problems related to nets—from dice rolls and volume derived from nets, to the central angle of a cone's net, and the shortest path around the side of a cone—the problems progress from easiest to hardest. ■ No paper and pen needed—built-in calculator The answer field allows you to write not only numbers but also equations (corresponding to ×, ÷, +, −, ( ), and √). "12×8÷2" and "√(13×13−5×5)" are both graded correctly. You can also perform intermediate calculations using "=Calculate," and if the equation is incorrect, it will not deduct hearts. You'll use the same calculator in all three stories, not just the main story and challenges. ■ When you're stuck, follow the "Solution" step by step. Each press advances the solution by one step. For signature problems like clock hands, folding, leaf shapes, and Hippocrates' moon, auxiliary lines are drawn smoothly, the areas of interest are highlighted, and equal angles are marked. You can also draw your own auxiliary lines on the diagram (snap to vertices, midpoints of edges, and the center of circles). Auxiliary lines can be used in story requests and elementary school "marking" problems (displayed as "Draw a line" for elementary school students). ■ How to continue playing ・Ranks ― Apprentice → Geometry Explorer → Angle Hunter → Area Master → Geometry Master → Geometry Sage ・Combo ― The score multiplier increases with each correct answer. It resets to 0 if you make a mistake. ・Challenge ― 3-minute time attack / Survival with up to 3 mistakes. Keep your personal best • Stars and scores – Keep your personal best for each stage ■ For these people: • Elementary school students who want to solve many applied problems involving plane geometry for their middle school entrance exams • Middle school students who want to confidently solve problems involving inscribed angles and the Pythagorean theorem for their high school entrance exams • High school students who want to improve their speed in trigonometric ratios and area calculations for the Common Test and university entrance exams • People who have finished one geometry problem book and want to move on to the next challenge ■ Use with peace of mind • No advertisements whatsoever • No data usage (except for billing), everything is completed within your device • No personal information is collected • One-time purchase. No subscriptions or additional charges. ■ Free Content - First 4 stages each of the Angle and Area sections (8 stages total) - Time Attack (Angle section) - Story (Elementary School): First 5 steps of "Treasure Map" - Story (Middle School): First 3 chapters / (High School): First 2 chapters - Island Capture: First 2 islands per grade (6 islands total) - Net Master: First 8 questions (You can also see how nets become 3D shapes) - Calculator, "Solution" animations, auxiliary lines, hints, rank, record The remaining 57 stages, the continuation of the story, the remaining 18 islands in Island Capture, the remaining 93 questions in Net Master, "Challenge 10 Questions," "Advanced 10 Questions," "Challenge 10 Questions" for all stages, and all challenges are unlocked with a one-time purchase of ¥500 (one-time payment).