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The angles of a triangle are (x-40),(x-20)and (x/2-10) then find x

Posted by Bushra Ahsan 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

M M 5 years, 3 months ago

since the angles of a triangle sum up to 180° hence x-40+x-20+x/2-10= 180 2x - 70 +x/2= 180 (4x- 140 +x)/2 = 180 4x - 140 + x = 180× 2 5x - 140 = 360 5x = 360 + 140 x = 500/5 x = 100

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CBSE > Class 09 > Mathematics