Question

I have a square piece of paper(10cm) I fold The square in half to make a rectangle (A1) I fold the rectangle again to make a square (A2) What is the perimeter of

rectangle A1

And



what is the perimeter of square A2

Answer 1

A1: 30 cm

A2: 20 cm

Explanation:

1) Folding the square in half reduces two of the edges to half their former length, so the perimeter is now ...

sum of side lengths = 2·10 cm + 2·5 cm = 30 cm . . . A1

__

2) Again, the 10 cm edges are cut in half, so the perimeter of the square is ...

sum of side lengths = 2·5 cm + 2·5 cm = 4·5 cm = 20 cm . . . A2