noun ダウンロード 🔗共有 ラジアン In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad Examples : "The angle formed when you wrap the radius of a circle around its edge is one radian, a common unit for measuring angles in math and physics. " 円の半径をその縁に巻き付けたときにできる角度は1ラジアンで、数学や物理学で角度を測るための一般的な単位です。 math technical science AIとチャット語彙ゲーム読解練習