If a and b are the lengths of the legs of a right tri-angle whose hypotenuse is

游客2024-01-12  20

问题 If a and b are the lengths of the legs of a right tri-angle whose hypotenuse is 10 and whose area is 20, what is the value of (a + b)2?

选项 A、100
B、120
C、140
D、180
E、200

答案 D

解析
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