Answer: ∠A = 65°
Step-by-step explanation:
All angles in a triangle add up to 180°.
Firstly, you need to solve for x.
Set all angles equal to 180°:
2x - 9 + 2x + 4 + x = 180
Combine like terms:
5x - 5 = 180
Add 5 to both sides:
5x = 185
Divide both sides by 5:
x = 37
Now, plug x into angle A:
∠A = 2(37) - 9
∠A = 74 - 9
∠A = 65°
Hope this helps!
