Home » In the diagram, ST is parallel to UW, o, o, o and o. Calculate the value of y

In the diagram, ST is parallel to UW, o, o, o and o. Calculate the value of y

In the diagram, ST is parallel to UW, o, o, o and o. Calculate the value of y

A.
20
B.
25
C.
45
D.
65

Correct Answer: Option B

Explanation

x^o + z^o = 180^o (sum of

45^o + z^o = 180^o
z^o = 180^o – 45^o
z = 135^o
z + y^o + 20^o = 180^o (sum of

135^o + y^o + 20^o = 180^o
y^o + 155^o = 180^o
y^o + 180^o – 155^o
y^o = 25^o