arianna9588 arianna9588

17-02-2021
Mathematics

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This triangle is not drawn to scale.
What is the the measure of angle B in the triangle?

This triangle is not drawn to scaleWhat is the the measure of angle B in the triangle class=

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sushmaacharya328 sushmaacharya328

17-02-2021

Answer:

40+2x-30+x+20=180degree ( being the sum of all angle of the triangle )

or, 30+3x=180degree

or, 3x=180-30=150degree

or, x=150÷3=50degree

now, put the value of x in angle B then

angleB= 2×50-30=80degree ans.

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