Question

If a = 7cm , b= 5cm ,c = 3cm , prove that the traingle has an obtuse angle

Answer 1

Step-by-step explanation:

Let

angle A=3x

B=5x

C=7x

measure of all angles of triangle =180

A+B+C=180

3X+5X+7X=180

15X=180

X=180/15

x=12

now all the angles,

3×12=36°

5×12=60°

7×12=84°

hope this will help you