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In triangle QRS, measure of angle R is 20 degrees more than measure of angle Q and measure of angle S is 115 degrees more than measure of angle Q. Find measure of angle R.

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the angles add to 180, so since
R=Q+20, Q=R-20
S=Q+115 = (R-20)+115 = R+95

Q+R+S=180
R-20 + R + R+95 = 180
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