Question

13. The angles of a triangle are in the ratio 3: 5: 7. Find all the angles.​

Answer 1

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Let the common ratio be x

So the angles become 3x 5x and7x

Now we know that 3x+5x+7x=180°{anglesum properly of triangle}

So 15x=180°

x=180÷15

=12

Thus first angle is 36°

second angle is 60°

And third angle is 84°

Hope it helps

Answer 2

Answer:

Let angl1=3x

Angle2=5x

Angle3=7x

Since we know that the sum of all the angles of a triangle is 180,

Therefore,

Angle1+Angle2+angle3=180

3x+5x+7x=180

15x=180

x=180/15

x=12°.......

Therefore,

Angle1 =12*3=36

Angle2 =12*5=60

Angle3 =12*7=84