Find the area of a circle with diameter 15cm
2 answers:
Answer:
177 cm²
Step-by-step explanation:
Area of circle = r²
Radius = diameter/2 = 15/2 = 7.5
Therefore,
Area = 22/7 × 7.5 × 7.5
= 176.7 = <u>177 cm²</u>
Answer:
The answer is
<h2>176.71 cm²</h2>Step-by-step explanation:
Area of a circle is given by πr²
where
r is the radius
From the question we were given the diameter
To find the radius using the diameter we use the relation
diameter = 15 cm
radius = 7.5 cm
Substitute the value into the above formula and solve for the area
Area = (7.5)²π
= 56.25π
= 176.714586
We have the final answer as
176.71 cm² to 2 decimal places
Hope this helps you
You might be interested in
Given:
Triangle QRS has coordinates Q(-2, -2), R(0, 3), and S(4, -2) and is dilated by a scale factor of 2.
To find:
The new coordinates of point S', and state whether the dilation is an enlargement or a reduction.
Solution:
If a figure is dilated by factor k with origin as center of dilation, then
Where, 0<k<1 is reduction and k>1 is enlargement.
The figure is dilated by scale factor 2 which is greater than 1, so the dilation is an enlargement. The rule of dilation is:
Using this rule, we get
Therefore, the new coordinates of point S' are (8,-4).