Question

The sides of triangle are in the ratio 7:8:9 then
(A) angles of the triangle are in the ratio 7:8:9 (B) it is an acute angled triangle
(C) it is a right angled triangle
(D) it is an obtuse angled triangle​

Answer 1

Answer:

let ratio be the x

as we know the measurement of the angle is 180 degree

7x +8x +9x = 180°

24x = 180°

x = 180/24

= 80° ieach

. as it is less than 90 degree it means it is an acute angle

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Answer 2

Answer:

let their ratio be x

We know that the sum of all angles of a triangle =180°

A/q

7x+8x+9x=180°

=24x=180°

=x=180°/24=80°each