Question

A semicircular flower bed has a diameter of 3 metres.

What is the area of the flower bed?
m2

Give your answer to 1 decimal place.


Area of circle = πr²

Use π = 3.14

You can use a calculator for this question.

Answer 1

7.065
A semi circular shape is referring to half a circle.
We have the formula for the area of a circle so plug in the #.
r which is radius is equal to half the diameter and for pi we use 3.14

(3.14)(1.5)^2
Using a calc we get 7.065
since it says one decimal place we round it to 7.1 since the next digit 6 is greater than 5

Answer 2

`3.5\ m^(2)`

Explanation:

we know that

The area of a circle is equal to

`A=\pi r^(2)`

so

The area of a semicircle is equal to

`A=(1)/(2) \pi r^(2)`

In this problem we have

`r=3/2=1.5\ m` -----> the radius is equal to the diameter divided by two

`\pi=3.14`

substitute in the formula of area of the semicircle

`A=(1)/(2)*(3.14)*(1.5^(2))=3.5\ m^(2)`