A rectangle has a base and a height in a ratio of 1:1. a) what is the most specific name for this shape? b) If one side has a length of 5cm, what...

Hello!

a) the most specific name of this shape is a square (a rectangle whose sides are all equal). It is also a quadrilateral, a rectangle, a rhombus and a kite, but they may be not a square while a square is always each of them.

b) it has four equal sides, so the perimeter is 4*5cm=20cm.

c) if one side is 3cm then all others are also 3cm and the area is 3cm*3cm=`9cm^2.`

I believe that the perimeter and the area are simply numbers (with the units of a measure).