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NikAS [45]
3 years ago
10

PLEASE HELP ME WITH THIS QUESTION ASAP!!!!

Mathematics
1 answer:
svetlana [45]3 years ago
3 0

Answer:

<h2>137°</h2>

Step-by-step explanation:

The pentagon RSTYZ is a regular polygon. Therefore all angles are congruent.

If m∠RST = 108°, then m∠STY = 108°.

We have the equation:

m∠UTY + m∠STY + m∠STU = 360°.

Substitute m∠STY = 108° and m∠UTY = 115°.

115° + 108° + m∠STU = 360°

223° + m∠STU = 360°          <em>subtract 223° from both sides</em>

m∠STU = 137°

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