A triangle has one angle that measures 30 degrees and one that measures 100. What's the measure for the third angle?
2 answers:
Step-by-step explanation:
Sum of the interior angles of the triangle =180°
Let the third angle be x°
Therefore, x°+30°+100°=180°
x = 180°-130°= 50°
Answer:
50 degrees
Step-by-step explanation:
All the angles in a triangle must add up to 180 degrees
a+b+c=180
Substitute 30 in for a, and 100 in for b
30+100+c=180
Combine like terms
130+ c=180
Subtract 130 on both sides
c=50
So, the third angle is 50 degrees
Hope this helps! :)
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A.T.Q, equations will be:
x+y = 450
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Substitute value of x from equation (1), in equation (2)
2(450-y) +5y=1800
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y=300
so, your answer is 300
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