the perimeter of a square is 20 cm find the length of a side of the square and the diognal.

Question

help please !!!!!!!!!!!!!!!!!!1

Answer 1

f you know that the perimeter is 20,

then you have to divide by 4 to get the length of one side

 20/4=5.

Draw the diagonal and write in it's length as x.

Use Pythagorean formula

Then know that a²+b²=c²

and use the two side lengths as a and b.

This gives you the equation

5²+5²=x².

Do the calculations and solve the equation.

25+25=x²

 50=x²

√50=x.

Therefore x=√50 where x equals the length of the diagonal.