Question

在△ABC和△A′B′C′中,AB =7,BC =6,CA =5, ,B′,C′A′=2,则(　　)

A.∠A =∠A′                 B.∠A =∠B′             C.∠A =∠C′                 D.∠B′=∠B

Answer 1

思路分析:本题主要考查相似三角形的判定和相似三角形的表示.?

由= =3, = =3, = =3,?

得= =.?

从而△ABC∽△B′A′C′.?

∴∠A =∠B′,∠B =∠A′,∠C =∠C′.

答案:B