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lbvjy [14]
3 years ago
7

<a and <b are complementary angles. The measure of <a is four times as big as <b. What is the measure of <a​

Mathematics
1 answer:
Margaret [11]3 years ago
5 0
Answer = 72°

Complementary angles always add up to be 90.
We can write the smaller angle as x and the bigger angle as 4x, because it is 4 times bigger than x.

x + 4x = 90
5x = 90
x = 18.

This proves the smaller angle, or angle B, is 18. We know angle A is 4 times as big as 18, so we can multiply 18 x 4 to get 72.

Double check = 72 + 18 = 90
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Look at the picture.

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