Question

3.The angles of a triangle
are in the ratio 5:3:7.The
triangle is
O an acute angled triangle
O an obtuse angled triangle
O a right triangle
O an isosceles triangle​

Answer 1

Answer:

acute angled triangle

Explanation:

Let angles of a triangle be ∠A,∠Band∠C. Since, all angles are less then 90∘, hence the triangle is an acute angled triangle .

Answer 2

Answer:

Given - ration of angles 5: 3: 7

To find - type of triangle

Solution -

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

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

5x + 3x + 7x = 180°

15x = 180°

X = 180/ 15

X = 36 /3

X = 1 2 °

5x = 5 × 12 = 60°

3x = 3 × 12 = 36°

7x = 7 × 12 = 84°

It is an obtuse angled triangle