Question

23. If the radian measures of two angles of a triangle
3π÷5,4π÷5
are . then the radian measure of third
angle is​

Answer 1

Step-by-step explanation:

convert radian into degree.

(3Π÷5×180÷Π)=108°

(4Π÷5×180÷Π)=144°

sum of all angles of triangle is 180

108+144+x=180

252+x=180

252-180=-x

x=-72