Question

Circle T is dilated to create circle T. The radius of circle T is 4 units, while the diameter of circle

Tis 10 units. Find the circumference and area of both figures measured to the nearest hun-
dredth. Use 3.14 for T. Use the correct units for all final answers.
Calculate the area of circle T': A
78.50 units²
O 157 units²
O100 units²
O 31.40 units²

Answer 1

radius of circle T/smaller circle = 4 units

Diameter of larger circle is 10units

radius of larger circle = D/2

= 10/2 = 5units

CIRCUMFERENCE OF SMALLER CIRCLE =

2πr = 2 × 3.14 × 4

= 25.12 units

Area of smaller Circle =

πr² = 3.14 × 4 × 4

= 50.24 units²

CIRCUMFERENCE OF LARGER CIRCLE =

2πr = 2 × 3.14 × 5

= 31.4 units

Area of larger circle =

πr² = 3.14 × 5 × 5

= 78.5 units²