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Sagot :

Answer:

A.

Diameter = 24 cm × 2 = 48 cm

Circumference =3.14×2×24 cm = 150.72 cm

B.

Radius : 40m÷2 = 20 m

Circumferencec: 40 m × 3.14 = 125.6 m

C.

Radius: 35 cm÷2 = 17.5 cm

Circumference : 35 cm × 3.14 = 109.9 cm

D.

Diameter: 34.5 m × 2 = 69 m

Circumference: 34.5m × 2 × 3.14 = 216.66 m

Formulas:

[tex]radius \: = diameter \div 2[/tex]

[tex]diameter = radius \times 2[/tex]

Formula for Circunference, when diameter is given:

[tex]circumference = 3.14 \times diameter[/tex]

Formula of Circumference , when radius is given:

[tex]circumference = 2 \times 3.14 \times radius[/tex]