Question

Q3*

The angles of a triangle are in the ratio 3:5:7. The triangle is
(a) acute angled
(b) obtuse angled
(c) right angled
(d) an isosceles triangle
​

Answer 1

Answer:

Acute angled triangle

Step-by-step explanation:

The angles of the triangle are in the ratio: 5:3:7

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

By Angle sum property,

5x+3x+7x = 180

15x = 180°

x = 12

So,angles are 60° , 36° and 84°

Since all angles are less than 90°

Therefore, it is an acute angled triangle.