Page 162 - Start Up Mathematics_7

2. In the given figure, PQ || RS and a : b = 3 : 2. Then, f is equal to: a
P b Q
(a) 36° (b) 108° d c

(c) 72° (d) 144°
f e
R g h S

3. In the given figure, PQ || ST. Then, the value of x + y is: S T
85°
(a) 125° (b) 135°

(c) 145° (d) 120° P Q x O
y
4. Alternate interior angles have one common __________. 130° R

5. Two angles making a linear pair are always adjacent angles. (True/False)

n m

6. In the given figure, l, m and n are parallel lines, and the lines p 4c 3b l
p and q are also parallel. Find the values of a, b and c.
120° 6a
q

7. In the given figure, show that: 50° G
(i) AB || CD A E B
130° D
(ii) EF || GH 50° H
C
F
A Challenge!

Can you identify all pairs of parallel lines shown in the given figure?

c d e g
h

a
f
b

i

j
m
n

k

l
[Hint: Is your answer 3 pairs? If yes, one more than twice this number still eludes you. Try
to find the other pairs of parallel lines.]

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