In ∆abc,∠a:∠b:∠c=3:7:8. The measure of exterior angle formed by producing AB is ______.
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Answer:
110° is the answer
Step-by-step explanation:
3x+7x+8x=180°
18x=180°
x=10°
external angle = sum of two opposite angle
exterior angle at AB = <a + <c
= 30°+80°
= 110° ans
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