If two angles are complementary and one of them is 77°, what is the size of the other angle?
a. 13 degrees
b. 23 degrees
c. 77 degrees
d. 103 degrees
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If two angles are complementary and one of them is 77°, what is the size of the other angle?
a. 13 degrees
b. 23 degrees
c. 77 degrees
d. 103 degrees
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a. 13 degrees
Step-by-step explanation:
Complementary angles add to 90 degrees, therefore,
∠1+∠2=90
We know one of the angles is 77 degrees, so we can substitute that in.
77+ ∠2=90
Subtract 77 from both sides to solve for the angle
∠2=13
So, the angle is 13 degrees
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Answer:
A,13 DEGREES
COMPLEMENTARY ANGLE = 90 DEGREES
90 - 77 = 13