In the diagram, ST is parallel to UW, o, o, o and o. Calculate the value of y
Attached Figure / Diagram
A
20
B
25
C
45
D
65
Verified Correct Answer: B.
Step-by-Step Mathematical Solution
xo + zo = 180o (sum of o + zo = 180o
zo = 180o - 45o
z = 135o
z + yo + 20o = 180o (sum of o + yo + 20o = 180o
yo + 155o = 180o
yo + 180o - 155o
yo = 25o
Source: Myschool Past Questions Archive (Record #37006)