Question

step by step explain of this​

Answer 1

Step-by-step explanation:

a) 4cm

diameter=2×radius

=2×4

=8cm

b)3.1cm

diameter=2×radius

=2×3.1

=6.2

other are similar you can solve by yourself

I hope u understand the sums

Answer 2

Step-by-step explanation:

a)

Radius = 4cm

Diameter = ?

Diameter = 2 × radius

d. = 2 × 4

d. = 8 cm

b)

Radius = 3.1 cm

Diameter = ?

Diameter = 2 × radius

d. = 2 × 3.1

d. = 6.2 cm

c)

Radius = 4.6 cm

Diameter = ?

Diameter = 2 × radius

d. = 2 × 4.6

d. = 9.6 cm

d)

Radius = 5.4 cm

Diameter = ?

Diameter = 2 × radius

d. = 2 × 5.4

d. = 10.8 cm

e)

Radius = 21 cm

Diameter = ?

Diameter = 2 × radius

d. = 2 × 21

d. = 42 cm

Here is your answer...