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Alenkinab [10]
3 years ago
10

Find the value of x

Mathematics
1 answer:
Vilka [71]3 years ago
6 0
<span>An exterior angle of a triangle is equal to the sum of the opposite interior
angles  </span>⇒  x = 30 + 90 = 120°
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A triangle needs a total of 180° to be a complete triangle. First let's solve for m∠B since we have the other angles given in that triangle.

30 + 70 = 100

180 - 100 = 80° still needed to form a complete triangle. This is what m∠B equals.

From the image provided, we can see that both triangles are the exact same. So all we need to do now is find the angle that matches m∠B. In this case that angle is m∠D. Knowing that m∠B = 80° the final answer is:

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Hoped This Helped! Good Luck!

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thank you

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