The sum of an angle and half of its complementary angle is 75°. The measure of the angle is
(a) 40°
(b) 50°
(c) 60°
(d) 80°

The sum of an angle and one third of its supplementary angle is ${90}^{\circ }$. The measure of the angle is
(a) ${135}^{\circ }$
(b) ${120}^{\circ }$
(c) ${60}^{\circ }$
(d) ${45}^{\circ }$

Question 18

The difference fo two complementary angles is ${30}^{\circ }.$ Then the angles are
(a) ${60}^{\circ },{30}^{\circ }$
(b) ${70}^{\circ },{40}^{\circ }$
(c) ${20}^{\circ },{50}^{\circ }$
(d) ${105}^{\circ },{75}^{\circ }$

In the figure, triangle ABC is an isosceles triangle with AB = AC and measure of angle ABC = 50^o. Then the measure of angle BDC and angle BEC will be