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1.直角三角形的内切圆的半径如图1,设一个直角三角形的两直角边的长为a,b,斜边的长为 (a2+b2)~(1/2),则其内切圆半径
1. The radius of the inscribed circle of a right-angled triangle is shown in Fig. 1. The length of two right-angled sides of a right-angled triangle is a, b, and the length of the hypotenuse is (a2+b2)~(1/2), then the radius of the inscribed circle.