Perimeter of shapes

Question 1

Perimeter of square

Answer 1

4a
a=length of one side

Question 2

Perimeter of triangle

Answer 2

a+b+c
a,c= side lengths of triangle
b=base length of triangle

Question 3

Circumference of circle

Answer 3

2𝝅r
r=radius

Question 4

Perimeter of rectangle

Answer 4

2a+2b
a,b=height/length

Question 5

Perimeter of parallelogram

Answer 5

2a+2b
a,b+height/length

Question 6

Perimeter of trapezoid

Answer 6

{(b+d)/2]h