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g100num [7]
4 years ago
13

An angle in a triangle measures 138 °. The other two angles are congruent. Enter and solve an equation to find the x measure of

the congruent angles. An equation is _______ = 180. Angles congruent with each measure ________

Mathematics
1 answer:
Juli2301 [7.4K]4 years ago
5 0

Hey there! I"m happy to help!

The interior angles of a triangle add up to 180. We have 2 angles that have a value of x, so 2x+138=180.

We subtract 138 from both sides.

2x=42

We divide both sides by 2

x=21.

Have a wonderful day! :D

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