35) What is the name of side opposite to right angle in a triangle?

36) What is the name of triangle with all the three angles, one of the angle is equal to 90 Degree?

37) What is the standard ratio for line thickness 'd' in lettering 'B' type?

38) Name the quadrilateral if opposite sides are equal and parallel and all four angles are right angles?

39) What is the sum of interior angles in a quadrilateral?