The diagonal of a square is 10
2
cm, find its perimeter.
- A160 cm
- B80 cm
- C20 cm
- D40 cm
Solution & Step-by-step Explanation
Let the side length of the square be acm.
The formula for the diagonal (d) of a square in terms of its side is:
d=a
2
Given that d=10
2
cm:
a
2
=10
2
a=10cm
The perimeter (P) of a square is given by the formula:
P=4a
P=4×10=40cm
The formula for the diagonal (d) of a square in terms of its side is:
d=a
2
Given that d=10
2
cm:
a
2
=10
2
a=10cm
The perimeter (P) of a square is given by the formula:
P=4a
P=4×10=40cm