English Dictionary

alternate angles

名詞

複数形 複数形のみ

(geometry) the internal angles made by two (parallel) lines with a third, on opposite sides of it.

日本語の意味

平行線と交わる第三の直線が作る、互いに反対側に位置する内角（交互内角）

When a transversal crosses two parallel lines, the alternate angles formed on opposite sides of the transversal are equal, so you can use them to prove triangles are congruent.

横切る直線が2本の平行線を交差すると、その直線の反対側にできる内角（錯角）は等しく、それを利用して三角形の合同を証明できます。

意味（1）

(geometry) the internal angles made by two (parallel) lines with a third, on opposite sides of it.

意味（2）

If the parallels AB, CD, are cut by the line EF, intersecting at points G and H, then the angles AGH, GHD, are called alternate angles (as also are the angles BGH and GHC).