Prove that the angles in a semi-circle are right angles. Share with your friends Share 0 Aakash Sharma answered this Here is the link for the answer to your query. https://www.meritnation.com/discuss/question/1555971/1/ 0 View Full Answer Dkk answered this The angle subtended by a semi-circle at the centre is 180 degree.=> angle made by a semicircle on the any of the remaining part = (1/2 X 180 ) degree = 90 degreeHence, a semicircle subtends right angles. 1