Page 1 - CL-8 CH-1CBQ

SAI International School

Class: VIII
Mathematics

CHAPTER 3: UNDERSTANDING QUADRILATERALS (CBQ)
1 If PQRS is a parallelogram, then find ∠P − ∠R.
a. 180 , (b) 360 , (c) 0, (d) 60
0
0
0
Answer: (c) 0
2 State true or false: A quadrilateral can have equal sides and angles but still not be a
square? If yes name the quadrilateral.
Answer: True, Rhombus.
3 Assertion (A): All the parallelograms are rectangles.
Reason(R): All the rhombuses are parallelograms.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
ANSWER: d
4 Which of the following quadrilaterals has two pairs of adjacent sides equal and its
diagonals intersect at 90 degrees?
A. Square
B. Kite
C. Rhombus
D. Rectangle
Answer: B. Kite
5 Fill in the blanks: The perimeter of a parallelogram whose parallel sides have lengths equal
to 12 cm and 7 cm is _____________.
ANSWER: 38cm.
6 In parallelogram ABCD. Find x and y.

ANSWER: x= 6, y= 9

7 The perimeter of a parallelogram is 150 cm. One of its sides is greater than the other by 25
cm. Find length of all sides of the parallelogram.
ANSWER: 25,25,50,50.