Question

find the perimeter of the rectangle whose length is 60 cm and diagonal is 61 CM ​

Answer 1

60×60-61×61=side 2

3721-3600=121=11 cm

Perimeter=2×60+2×11=120+22=142 cm

Answer 2

length = 60 cm

diagonal = 61 cm

by pyth thm

let the breadth be x

(x)sq +(60)sq = (61) sq

3721-3600= (x) sq

121=(x) sq

x = 11 cm

perimeter = 2(l+b)

= 2 X (60+11)

= 2 X 71

= 142cm