Question

∠A与∠B的读书和恰好是∠C的读书的5倍,∠A比∠B大70度,你能求出△ABC各个内角的度数吗?

Answer 1

∠A=x

∠B=70+x

∠C=(2x+70)/5

x+70+x+(2x+70)/5=180

解得x=40

∠A=40

∠B=110

∠C=30