Answer:
it D just took the test
Step-by-step explanation:
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x = 20
x° + 2x° + (x+10)° = 90°
3x° + x° + 10° = 90°
4x° + 10° = 90°
4x° = 90°-10°
4x° = 80°
x = 80/4
3
Hard to see but pretty sure thats it
70
By exterior angle theorem:
