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Question

Find the perimeter and area of the following combined figure.
616510_86acc25d60174309baf7709982ccd31f.jpg

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Solution

The given combined figure is made up of a square ABCD and an equilateral triangle DEA.
Given: Side of a square =4cm
Perimeter of the combined figure =AB+BC+CD+DE+EA
=4+4+4+4+4=20cm
Perimeter of the combined figure =20cm.
Area of the given combined figure = Area of a square + Area of an equilateral triangle
=a2+34a23=1.732
=4×4+34×4×4
=16+1.732×4
Area of the given combined figure =16+6.928=22.928
Area of the given figure 22.93cm2.

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