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Mathematics

Grade-8

Easy

Question

Find the value of x.

8^o
5^o
10^o
2^o

hint Hint:

we know that sum of all interior angles of the triangle is 180

The correct answer is: 5^o

we know that sum of all interior angles of the triangle is 180
given; that one angle is 30
other two angles are 7x-3 and 2x+9
30+7x-3+2x+9=180
9x+36=180
9x=180-36
9x=144
x=144/9
x=16
Therefore ;the value of x is 16

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