Question

Find the perimeter and area (for a & b) of:a) A square of side 3.2 cm.b) A rectangle of length 7.2 cm and breadth 3.8 cm.c) An equilateral triangle with side 12.5 cm.​

Answer 1

Answer:

i hope it helps you in solving this question

Answer 2

Step-by-step explanation:

1. perimeter of square is 4s

so 4×3.2=12.8 cm

area of square is s²

(3.2)²

=10.24 cm²

2.perimeter of rectangle=2(l+b)

=2(7.2+3.8)

=2×11

=22cm

area of rectangle=l×b

=7.2×3.8

=27.36

3.an area of equilateral triangle is√3/4 s²

√3/4(12.5)²

√3/4×156.25

1.73×39.06

67.57