noun
midpoint theorem
A theorem in geometry stating that the segment joining the midpoints of two sides of a triangle is parallel to the third side and half its length.
中点連結定理を使って、三角形の辺の長さを求める。
Use the midpoint theorem to find the length of a side of the triangle.
Compound of 中点 (midpoint), 連結 (connection), and 定理 (theorem).