Unknown angle problems (with algebra)
1 answer:
Answer:
x = 20
Step-by-step explanation:
100 + 3x + x = 180
100 + 4x = 180
- 100 -100
4x = 80
÷4 ÷4
x = 20
360° is a full circle, and since this is half you set the numbers equal to 180°
I hope this helps!
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