湯崩の定理①（三平方の定理を利用）

Topic:Area, Centroid or Barycenter, Circle, Circumcircle or Circumscribed Circle, Constructions, Diagrams, Dilation, Geometry, Plane Figures or Shapes, Polygons, Pythagoras or Pythagorean Theorem, Quadrilaterals, Right Triangles, Tangent Line or Tangent, Triangles