Question

Help me please! Its really complicated

Answer 1

1. 4.5 cm

2. 25.13 inches

3. 78.54 cm

4. 13 cm. 6.5 +6.5

Radius is half the diameter

Answer 2

Explanation:

1) Radius = Half of Diameter

`r = (1)/(2) d \\ r = (1)/(2) * 9 \\ = 4.5cm`

2) Given r = 4 in.

Circumference of Circle =

`2\pi \: r \\ = 2\pi(4) \\ = 8\pi \: cm`

3) Given r = 5 in.

Area of Circle =

`\pi {r}^(2) \\ = \pi {5}^(2) \\ = 25\pi {cm}^(2)`

4)Diameter = 2x Radius

`d = 2r \\ = 2 * 6.5 \\ = 13cm`

Note for questions 2 and 3 I will leave answers in terms of pi as the question did not specify to leave the answer as what. You can use your calculator to evaluate them if needed.