Use the order of operations to evaluate the expression below. 5 + 7 • 2 - 90 / 3 + 8 - 1
1 answer:
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Step-by-step explanation:
1=78°
3= 78°
4= 360°- 78° - 78°
= 204° ÷ 2
= 102°
2= 102°
Note that 1+2+3+4=360°
180° - (4)
= 180° - 102°
= 78° ÷ 2
= 39°
ans; angle ACD is 39°
