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Find the missing angle measure in ΔQRS. Q = ____°, R = 60°, S = 20° A. 80 B. 100 C. 120 D. 60
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Jun 15, 2018
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Find the missing angle measure in ΔQRS.
Q = ____°, R = 60°, S = 20°
A. 80
B. 100
C. 120
D. 60
Mathematics
middle-school
Magallanes
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A triangle always has 180 degrees.
180 = x + 60 + 20
180 = x + 80
100 = x
So our answer is B.
Nayan Dabhi
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Jun 16, 2018
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Nayan Dabhi
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The answer would be B because all 3 angles on a triangle must add up to 180 degrees. Since the two angles you do know add up to 80, you need the last angle to be 100 degrees.
Evy
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Jun 22, 2018
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