Question

Question 2 (iii)
Find the values of unknowns x and y in the following diagram:

Answer 1

${50}^{\circ }+{60}^{\circ }=x\text{[Exterior angle property of a}\Delta ]\Rightarrow x={110}^{\circ }Now,{50}^{\circ }+{60}^{\circ }+y={180}^{\circ }\text{[Angle sum property of a}\Delta ]\Rightarrow {110}^{\circ }+y={180}^{\circ }\Rightarrow y={180}^{\circ }-{110}^{\circ }\Rightarrow y={70}^{\circ }$