△ABC中,∠B=∠C=2∠A,则∠A=____,∠B=___,∠C=___.
问题描述:
△ABC中,∠B=∠C=2∠A,则∠A=____,∠B=___,∠C=___.
答
∵∠B=∠C=2∠A
∠A+∠B+∠C=180°
∴5∠A=180°
∴∠A=36°
∠B=∠C=72°