Question

If the angles of a triangle are in the ratio 5:3:7, then Find the measure of all the angles.
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Answer 1

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Let the angles of a triangle be 5x,3x and 7x.

Sum of all angles of a triangle is 180.

$5x+3x+7x=180 \\ 15x = 180 \\ x = 12$

So,

First angle = 60°.

Second angle = 36°

Third angle= 84°

Answer 2

Answer:

Let the angles be 5x, 3x, 7x.

5x+3x+7x=180 (Angle sum property)

15x=180

x=12

5x=60

3x=36

7x=84

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