∵∠A=1/2∠B=1/3∠C
∴∠B=2∠A=2/3∠C
∠A=4/3∠C
∵∠A+∠B+∠C=180°
∴4/3∠C+2/3∠C+∠C=180°
4∠C+2∠C+3∠C=540°
9∠C=540°
∠C=60°
∴∠A=4/3×60°=80°
∠B=2/3×60°=40°
∴∠A=8...
∵∠A=1/2∠B=1/3∠C
∴∠B=2∠A=2/3∠C
∠A=4/3∠C
∵∠A+∠B+∠C=180°
∴4/3∠C+2/3∠C+∠C=180°
4∠C+2∠C+3∠C=540°
9∠C=540°
∠C=60°
∴∠A=4/3×60°=80°
∠B=2/3×60°=40°
∴∠A=8...