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How do I find the area and premiter of these shapes

How do I find the area and premiter of these shapes-example-1
User Saadia
by
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1 Answer

12 votes
12 votes

The area of the circle is


A=\pi(r)^2

The perimeter of the circle is (its circumference)


P=2\pi(r)

r is the radius of the circle

Since r = 3 ft, then


\begin{gathered} A=\pi(3)^2=9\pi ft^2 \\ P=2\pi(3)=6\pi\text{ ft} \end{gathered}

The area of the triangle is


A=(1)/(2)bh

b is the base

h is the height

Since the base is 5 ft, and the height is 5 ft, then

b = 5

h = 5


A=(1)/(2)(5)(5)=12.5ft^2

Since the 3 sides of the triangle are equal, then its perimeter is the sum of the 3 sides


P=5+5+5=15ft

The area of the square is


\begin{gathered} A=s* s \\ P=s*4 \end{gathered}

Since the side of the square is 5 ft


\begin{gathered} A=5*5=25ft^2 \\ P=5*4=20ft \end{gathered}

User Karolba
by
3.2k points
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