△ABC中,∠B=∠C=2∠A,则∠A=____,∠B=___,∠C=___.

问题描述:

△ABC中,∠B=∠C=2∠A,则∠A=____,∠B=___,∠C=___.

∵∠B=∠C=2∠A
∠A+∠B+∠C=180°
∴5∠A=180°
∴∠A=36°
∠B=∠C=72°