Question

If the angles of a triangle are in the ratio 1:4:5,find the angles.

Answer 1

Let the angles of triangle are x , 4x , 5x
we know that
x+4x+5x=180°
10x=180°
x=18°
NOW
the angles of triangle are 18° 72° and 90°
Hence it is a right angked triangle.

Answer 2

1x+4x+5x=180 ( angle sum property)

10x=180

x=180/10

x=18

1x=18°

4x=72°

5x=90°