Question

4. In parallelogram ABCD, AB = 16 cm and BC = 12 cm. Find the perimeter of parallelogram.


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Answer 1

Answer:

In △ABC,

s=

2

AB+BC+CA

⇒s=

2

12+20+16

=24cm

By using Heron's formula,⇒A=

s(s−a)(s−b)(s−c)

Area of △ABC(A)=

24(24−16)(24−12)(24−20)

⇒A=

24×8×12×4

=96cm

2

Therefore,

As we know that the diagonal of a parallelogram divides it into two equal triangles.

Therefore,

Area of parallelogram =2A=2×96=192cm

2

Answer 2

Answer:

• (b*h) 12*16 =192 cm

Explanation:

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