Answer the following (3 mark each)

Question 13 Marks

Here is a rectangle of area $20$ square cm.

$1.$ Draw one straight line in this rectangle to divide it into two equal triangles. What is the area of each of the triangles ?
$2.$ Draw one straight line in this rectangle to divide it into two equal rectangles. What is the area of each of the smaller rectangles ?
$3.$ Draw two straight lines in this rectangle to divide it into one rectangle and two equal triangles. What is the area of the rectangle ? What is the area of each of the triangles ?

Answer

SELF

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Question 23 Marks

The blue triangle is half of the big rectangle. Area of the big rectangle is $20$ square $cm$. So the area of the blue triangle is ... square $cm$. And what about the red triangle?

Answer

SELF

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Question 33 Marks

How will you decide whose hand is bigger - your hand or your friend's hand ?

What is the area of your hand ? .... square cm.

What is the area of your friend's hand ? .... square cm.

Answer

SELF

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Question 43 Marks

Which of these rectangles has the smallest perimeter ?

$1.$ Which two stamps have the same area ? How much is the area of each of these stamps $?$
$2.$ The area of the smallest stamp is .... square cm ?
$3.$ The difference between the area of the smallest and the biggest stamp is .... square $cm ?$

Answer

SELF

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Question 53 Marks

Which of these rectangles has the smallest perimeter ?

$1.$ How many squares of one centimetre side does stamp $A$ cover $?$
$2.$ Which stamp has the biggest area $?$ How many squares of side $1 \ cm$ does this stamp cover $?$
$3.$ How many squares of one centimetre side does stamp $B$ cover ?

Answer

SELF

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Question 63 Marks

Measures the side of the red (here dark) square on the dotted sheet. Draw here as many rectangles as possible using $12$ such squares.

$1.$ How many rectangles could you make ?
$2.$ Which of these rectangles has the longest perimeter ?

Answer

SELF

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MATHS Answer the following (3 mark each)

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