Question

length of rectangle is10.5 cm breadth is 4.5 cm radius is 1 cm fin d the area including the circle​

Answer 1

Answer:

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Step-by-step explanation:

• Perimeter of a closed figure is the distance around it while area is

the measure of the part of plane or region enclosed by it.

• Perimeter of a regular polygon = Number of sides × Length of one

side.

• Perimeter of a square = 4 × side

Fig. 9.1

• Perimeter of a rectangle = 2(l + b)

Fig. 9.2

• Area of square = side × side

• Area of rectangle = l × b

• Area of parallelogram = b × h

• Area of triangle =

1

2

×b×h

Fig. 9.3

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

Fig. 9.4

• The distance around a circle is known as its circumference.

• The ratio of circumference and diameter of a circle is a constant and

is denoted by π (pi).

• Approximate value of π is taken as 22

7

or 3.14

• Circumference of a circle of radius r is 2πr,

• Area of a circle of radius r is πr2