Q. 494.0( 3 Votes )

The angles of a triangle are in the ratio 3:5:7. The triangle is
A. acute angled

B. right – angled

C. obtuse angled

D. isosceles

Answer :

Let x be the common multiple.


3x + 5x + 7x = 180


15x = 180


x = 180/15


x = 12
3x = 3 X 12 = 36


5x = 5 X 12 = 60


7x = 7 X 12 = 84


Since, all the angles are less than 90o. So, it is acute angled triangle.

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