What is number 11. solve for x

Falco Alexander asked Sep 19, 2022

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Falco Alexander asked Sep 19, 2022

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20 votes

Answer:

78° +78°+3x-12= 180 {being isosceles triangle and sum of 3angles of a triangle is 180°}

156+ 3x-12=180

144+3x=180

3x=180-144.

3x=36

x = (36)/(3)

x=12

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