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Ray SU is an angle bisector of ∠RST. The measure of ∠TSU is 42°. What is the measure of ∠RST?
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Ray SU is an angle bisector of ∠RST. The measure of ∠TSU is 42°. What is the measure of ∠RST?

Ray SU is an angle bisector of ∠RST. The measure of ∠TSU is 42°. What is the measure-example-1
User Daniel Martin
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If we were to focus only on <RSU, the measure would be the same as <TSU, which is 42 degrees. However, because it is asking for the entire angle (<RST), the measure would be doubled. The measure of <RST is 84.
User Winton
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