Question

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

Answer 1

Answer:

As we know that sum of all angles of a triangle is 180°.

Let the angles be 3x, 5x and 7x respectively.Then,

3x+5x+7x = 180°

=> 15x = 180

=> x = 180/15 = 12

Now first angle = 3 x 12° = 36°

Second angle = 5 x 12° = 60°

and Third angle = 7 x 12° = 84°

Answer 2

Answer:

84°

Step-by-step explanation:

Let the angles of triangle be 3x, 5x, 7x

we know that,

Sum of angles of a triangle =180°

therefore, 3x + 5x + 7x = 180°

15x=180°

x=180/15

x=12°

now the largest angle 7x= 7×12. = 84°