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Sum of angles of triangle=180
(x-40)+(x-20)+(x/2 -10) =180
x-40+x-20+x/2 -10 =180
2x-70+x/2=180
4x-140+x=360
5x-140=360
5x=220
x=44
(x-40)+(x-20)+(x/2 -10) =180
x-40+x-20+x/2 -10 =180
2x-70+x/2=180
4x-140+x=360
5x-140=360
5x=220
x=44
sonisrishti2002:
Sorry at the end it's incirrect
It's 5x=500
Then x=100
thanks
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