radius

意味

• n. 半径
• n. 範囲

英語の定義

• n. the length of a line segment between the center and circumference of a circle or sphere
• n. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
• n. a circular region whose area is indicated by the length of its radius
• n. the outer and slightly shorter of the two bones of the human forearm

語形変化

複数形

radii

例文

1. n. 半径

   To calculate the area of the circle, you need to measure its radius first.

   円の面積を計算するには、まずその半径を測る必要があります。

2. n. 範囲

   There are several good restaurants within a two-mile radius of our hotel.

   私たちのホテルから半径2マイルの範囲には、良いレストランがいくつかあります。