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Find each measure. 30 points

Find each measure. 30 points-example-1
User FelixCQ
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Try this option (with short explanation):

15. m∠BAC=(180°-m∠ABC)/2=(180-60)/2=60°;

16. m∠SRT=(180-m∠STR)/2=(180-50)/2=65°;

17. if m∠TPR=60° and TP=RP=4, then m∠PRT=m∠PRT=m∠TPR=60°, then TR=TP=RP=4. Finally, TR=4;

18. if m∠ABC=m∠BAC, then AC=CB. Filnally, CB=3.

User Leobelizquierdo
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