Oh, what a delightful question! To find the perimeter of a shape, you simply add up all the sides. So for a shape with sides measuring 7cm, 8cm, and 12cm, you would add them together to find the total perimeter. In this case, the perimeter would be 7cm + 8cm + 12cm = 27cm. Just imagine all those sides coming together like old friends for a lovely little stroll around the shape!
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48cm
Find the area of 5cm 12cm 8cm
The answer is, you can draw a rectangle with these measurements: 6cm and 9cm 5cm and 10cm 7cm and 8cm
Divide the perimeter length by 4 ie 8cm and square the result ie 8cm x 8cm = 64sq cm
36cm