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Mathematics

Grade-8

Easy

Question

Find the measure of all the angles of the triangle.

34^o
17^o
21^o
25^o

hint Hint:

The sum of all angles of the triangle is 180
4a+7+5a+6+a-3=180

The correct answer is: 17^o

the measure of all the angles of the triangle.

4a+7+5a+6+a-3=180
10a+10=180
a+1=18
a=18-1
a=17

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