Answer:
sum of interior angles of a triangle is 180°
10x-4°+8x+3°+91°=180°
x=5
x = 5°
Step-by-step explanation:
total sum of triangles interior angle is 180°
solve:
10x - 4° + 8x + 3° + 91° = 180°
10x + 8x - 4° + 3° + 91° = 180°
18x + 90° = 180°
18x = 180° - 90°
18x = 90°
1.6m questions
2.0m answers