Question

Please help, I can’t figure this out

Answer 1

x=15°, ∠A=75°, ∠B=60°, ∠C=45°

Explanation:

As we know that sum of the angle of a triangle is 180°

Therefore ∠A+∠B+∠C=180°

5x+4x+3x=180° { ∵ ∠A=5x ∠B=4x ∠C=3x }

⇒ 12x=180°

⇒ x=15°

Hence ∠A=5x=5×15°=75°

∠B=4x=4×15°=60°

and ∠C=3x=3×15°=45°

to verify your answer 75°+60°+45°=180°

Answer 2

Answer: 75, 60, 45

Working solution below