Question 1 of 100

In the figure below not scale, XYZ is an isosceles triangle where XZ =ZY. XZW is a straight line. Three angles are labelled as a, b and c. Which of the following statement is true?

Question Image of In the figure below not scale, XYZ is an isosceles triangle where XZ =ZY. XZW is a straight line. Three angles are labelled as a, b and c. Which of the following statement is true? .
A
$\angle$b = $\angle$c
B
$\angle$c = 2$\angle$a
C
$\angle$b = 180$^\circ$ - $\angle$a
D
$\angle$a + $\angle$b = 180$^\circ$ - $\angle$c
E
None of the above