Question

please solve it,class ninth​

Answer 1

Answer:

Let the angles be A , B , C

A = 5x

B = 3x

C = 7x

Sum of all interior angles of triangles = 180°

= 5x + 3x + 7x = 180°

= 15x = 180°

∴ x = 12°

Angle A = 5x = 60

Angle B = 3x = 36

Angle A = 7x = 84

Triangle is not a right angles triangle.

Answer 2

Step-by-step explanation:

Ratio = 5:3:7

Let the all angles be x.

A = 5x

B = 3x

C = 7x

We know that,

the angle of all side is 180°.

= 5x +3x+ 7x = 180°

= 15 x = 180°

= x= 180°/15

= x= 12°

A = 5x

= 5 × 12°

= 60°

B = 3x

= 3 × 12°

= 36°

C = 7x

= 7× 12°

= 84°

hope it helps you.

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