Find perimeter of rectangle whose sides are 4 cm and 9mm
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2
Answer:
ABCD is a rectangle. We know that the opposite sides of a rectangle are equal.
AB = CD = 5 cm and BC = AD = 3 cm
So, the perimeter of the rectangle ABCD = AB + BC + CD + AD = 5 cm + 3 cm + 5 cm + 3 cm = 16 cm
Perimeter of a Rectangle
It can be written as 5 cm + 5 cm + 3 cm + 3 cm
= (2 × 5) cm + (2 × 3) cm
= 2 (5 + 3) cm
= 2 × 8 cm
= 16 cm
We add length and breadth twice to find the perimeter of a rectangle.
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2
2*(l+b)
l=4cm
b=9/10=0.9cm
2*(4+0.9)
2*4.9
9.8
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