正四角すいの斜め切断 2026 愛知県公立入試 ３の(3)

Topic:Area, Constructions, Equilateral Triangles, General Quadrilateral, Geometry, Isosceles Triangles, Line Segment, Mathematics, Plane Figures or Shapes, Planes, Pyramid, Pythagoras or Pythagorean Theorem, Quadrilaterals, Ratios, Right Triangles, Similar Triangles, Solids or 3D Shapes, Square, Symmetry, Trapezoid, Triangles