Question

In right triangle ABC, AC is divided by the
point O, which is also centre of semicircle in
such a way that AO = 15 units, CO = 20
units. Find the radius of semicircle.

Answer 1

diameter= 15+20 units
= 35 units .
Radius of semicircle = d/2
= 35/2 = 17.5 units.

Answer 2

correct answer 12cm. sinA=X/15. ,cosA=X/20