Answer:
17degrees
Step-by-step explanation:
Since the triangle ABC is a right angled triangle, one of the angle is 90 degrees
The sum of angle in a triangle is 180
m<A + m<B + m<C = 180
73 + 90 +m<C = 180
163 +m<C = 180
m<C = 180-163
m<C = 17 degrees
Hence the third angle is 17degrees
