Subject :IMO Class : Class 7
In the figure, PQ is parallel to ST. AB is a straight line. Find ∠BST.
A 110°
B 125°
C 152°
D 98°
I din't understand this question
Ans 1:
Class : Class 7
i agree
Ans 2:
Class : Class 7
option a is correct as angle pqs is epual to angle qsa +angle ast (alternate interior angle)=70
98=28+x
x=98-28
x=70
ast+tsb=180(straight angle)
70+y=180
y=180-70
y=110