Question

The angles in a triangle are in the ratio 1 : 2 : 9 What is the size of the largest angle?


a)135 degrees

b)95 degrees

c)140 degrees

d)160 degrees

Answer 1

Answer:

135

Let the angles be x,2x,9x

Sum of all angles of triangle is 180

so,

x+2x+9x=180

x=15

largest angle is 9x= 9×15=135