Question

That’s the pic of what I need help with

Answer 1

perimeter = 16
`√(5)` mm , area = 80 mm²

Explanation:

the sides of a square are congruent ( equal )

the perimeter (P) of a square is then calculated as

P = 4s ( s is the side length )

here s = 4
`√(5)` , then

P = 4 × 4
`√(5)` = 4 × 4 ×
`√(5)` = 16
`√(5)` mm

the area (A) of a square is calculated as

A = s² = ( 4
`√(5)` )² = 4² × (
`√(5)` )² = 16 × 5 = 80 mm²