Question

Diagonal of a square is 4 cm find its area and perimeter

Answer 1

Answer:

Step-by-step explanation:

area of square = 1/2(diagonal)²

                           = 1/2(4)²

                           = 1/2×16

                            = 8 cm²

2 side of square =√area

                           = √8

                            = √4×2

                                = 2√2 cm

its perimeter = 4 ×side = 4 ×2√2=8√2 cm