Interior angles in a triangle add up to 180˚. Triangles close triangleA polygon with three straight sides. have three sides, therefore they have three angles. Interior angles in a triangle sum to a ...

ii) (Prove) If two lines intersect, the vertically opposite angles are equal. iii) (Motivate) Results on corresponding angles, alternate angles, and interior angles when a transversal intersects two ...

CBSE Class 9 Maths extra questions and answers for Chapter 6 - Lines and Angles provided here for students to revise important fundamental concepts. Practicing with these questions will help you ...