S.chand books class 8 maths solution chapter 19 Special Types of Quadrilaterals exercise 19 A

 EXERCISE 19 A

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Question 1

What would you call a figure having four sides out of which two opposite sides are parallel ?

Sol :

Trapezium

Question 2

What would you call a figure having four sides, the opposite sides parallel and the angles at the corner right angles ?

Sol :

Rectangle

Question 3

What would you call a figure having four equal sides, the opposite sides parallel and the angles at the corners right angles ?

Sol :

Square

Question 4

What shape is a one-rupee currency note ?

Sol :

Rectangle

Question 5

Write true or false
(i) Every quadrilateral is a parallelogram
(ii) Every parallelogram is a rhombus
(iii) Every square is a rhombus
(iv) Every square is a rectangle
(v) No parallelogram is a square
(vi) Every square is a parallelogram

Sol :
(i) False
(ii) False
(iii) True
(iv) True
(v) False

Question 6

ABCD is a parallelogram.What special name will you give it , if the following additional facts are known ?
(i) AB=AD
(ii) ∠BAD is a right angle
(iii) AB=AD and ∠BAD = right angle

Sol :
(i) Rhombus
(ii) Rectangle
(iii) Square

Question 7

DE are points on sides AB , AC of Δ such that DE||BC. What is a quadrilateral BCED called ?

Sol :

Trapezium

Question 8

How does a trapezium differ from a parallelogram ?

Sol :

A trapezium has one pair of opposite sides parallel , while a parallelogram has two pairs of opposite sides parallel