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Gemiola [76]
2 years ago
9

PLEASE HELP!!!

Mathematics
1 answer:
never [62]2 years ago
6 0

Answer:

Lee has more pizza

Lee has 2.24 in^2 more than John

Step-by-step explanation:

step 1

Find the area of each slice of pizza

A=\frac{1}{8}\pi r^{2}

we have

r=16/2=8\ in ----> the radius is half the diameter

substitute

A=\frac{1}{8}\pi 8^{2}

A=8\pi\ in^{2}

step 2

Find the area of John's part (area of shaded triangle)

The measure of the central angle of each slice of pizza is equal to

360\°/8=45\°

so

the height of triangle is equal to the base

Let

x ---->the base of the shaded triangle

cos(45\°)=\frac{x}{r}

cos(45\°)=\frac{x}{8}

Remember that

cos(45\°)=\frac{\sqrt{2}}{2}

substitute

\frac{\sqrt{2}}{2}=\frac{x}{8}

solve for x

x=4\sqrt{2}\ in

Find the area of shaded triangle

A=(1/2)(4\sqrt{2})(4\sqrt{2})=16\ in^2

step 3

Find the area of Lee's part

The area of Lee's part is equal to the area of two slices of pizza minus the area of two triangles

so

2(8\pi)-2(16)=(16\pi-32)\ in^2

assume

\pi =3.14

(16(3.14)-32)=18.24\ in^2

so

Lee's part is greater than John part's

Find the difference

18.24-16=2.24\ in^2

therefore

Lee has more pizza

Lee has 2.24 in^2 more than John

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