Question

find perimeter of rectangle ABCD given that
CD = 7cm, AD =3.5cm​

Answer 1

Answer:

PERIMETER = 21 CM

Step-by-step explanation:

preimete of a rectangle= 2×(length+bredth)

Lenght = 7cm

breath = 3.5 cm

P= 2×(l+b)

P = 2 × 10.5 cm

PERIMETER = 21CM

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Answer 2

$\large\underline{\underline{ \sf \maltese{\:Given:-}}}$

➻In a rectangle ABCD

• ✏ CD measures 7cm
• ✏ AD measures 3.5cm

__________________________________________

$\large\underline{\underline{ \sf \maltese{\:To\:Find:-}}}$

❒ The measure of its perimeter.?

__________________________________________

$\large\underline{\underline{ \sf \maltese{\:Solution:-}}}$

☯️ Now let's consider AD as the width of the rectangle

And CD as the length of the rectangle.

❶ Length equals 6cm

❷ breadth equals 3.5cm

$\large\rm{ \red{\underbrace {\red{perimeter \: of \: a \: rectangle = 2(l + b)}}}} \red \dag$

$: \implies \sf \: perimeter \: of \: the \: rectangle = 2(7 + 3.5) \\ \\ \\ : \implies \sf \: perimeter \: of \: the \: rectangle = 2(10.5) \: \: \: \: \: \\ \\ \\ : \implies \sf \: perimeter \: of \: the \: rectangle = 21cm \bigstar\: \: \: \: \:$

$\blue{ \underline{ \boxed{ \pink{ \mathfrak{ \therefore \: perimeter \: of \: the \: rectangle = 21cm}}}}}$