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belka [17]
3 years ago
15

Given rhombus PQRS and angle S=40 degrees, what is the measure of angle R

Mathematics
1 answer:
LiRa [457]3 years ago
4 0

the sum of the interior angles of a quadrilateral is 360°


[360 - (40 * 2)] : 2 =


280 : 2 =


140°

-------------------------------


140 + 140 + 40 +40 = 360°

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