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Well, 40 degrees is already given.. And the angle "R" I assume has a box in its corner, that represents a 90 degree angle. as for I.E: "L" <-- is a 90 degree angle. so you add 40 + 90 = 130. In all triangles will always = 180 degrees. No if and's or but's about it. so you would take your 130 degrees subtract from 180 degrees, 130 - 180 = 50! and that will decipher your answer your looking for.

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11y ago
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Q: What is the measure of angle rpq if rp is 10.2cm and pq is 16cm and qr is 40 degree angle?
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