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Mathematics

Grade-8

Easy

Question

Find the measures of a, b and c?

$a = 60 °, b = 60 °, c = 60 °$
$a = 70 °, b = 30 °, c = 80 °$
$a = 90 °, b = 45 °, c = 45 °$
$a = 100 °, b = 30 °, c = 50 °$

hint Hint:

We know the measure of each angle of an equilateral triangle is 60.
So, angle X = angle Y = angle Z = 60 degree

The correct answer is: $a equals 60 degree comma b equals 60 degree comma c equals 60 degree$

We know the measure of each angle of an equilateral triangle is 60.
So, angle X = angle Y = angle Z = 60 degree
Now, exterior angle a and angle x are supplementary.
So, a = 60
And exterior angle c and angle y are supplementary.
So, c = 60
And exterior angle b and angle z are supplementary.
So, b = 60
Hence, the measure of a=b=c=60.

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