Question

Find the area of DEFC and it's perimeter.
Find the perimeter of ABCD
​

Answer 1

Answer:

1. Area of DEFC = 180cm²

Perimeter of DEFC = 54cm

2. Perimeter of ABCD = 40cm

Step-by-step explanation:

1. FB=24cm

AB=12cm

Area of ABFE=(24×12)cm²=288cm²

Area of ABCD=108cm²

So, area of DEFC=(288-108)cm²=180cm²

AB=DC

So, DC=12cm

Then the other side, FC=(180/12)cm=15cm

Then perimeter of DEFC,2(12+15)cm=2×27cm=54cm

2. Side BC=FB-FC=24cm-15cm=9cm

Side AB=11cm

So, perimeter of ABCD,

2(9+11)cm=2×20cm=40cm

Hope it helps you...

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