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ss7ja [257]
3 years ago
5

What is the measure of each of the arc?

Mathematics
1 answer:
madam [21]3 years ago
5 0
A=138° B=180° C=180° D=138°
This is because angle QRS and QTS would equal 180° Bc they are supplementary. So 180-42=138. And since they are supplementary and vertical angles, angle ST would also be 42° and QT would also be 138° because angle RS is 138°
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Learn more on proportion here; brainly.com/question/1496357

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