Answer:
1. The pan has lengths of 12 and 12 (remember that a pizza pan/box is a square so all sides are the same length).
That would mean the area of the pan is;
12 x 12 = 144
Now in finding the area of the pizza, we must know the formula for finding the area of a circle, which is;
A = pi*r^2,
where pi is 3.14 or 22/7, and r is the radius which is squared
So replace those values:
A = 3.14 x 4^2
A = 3.14 x 16
A = 50.24
But now they want us to find out the area of the parts that have not been covered, so we subtract the area of the pizza from the total of the pan;
144 - 50.24
= 93.76 square inches
2. To find the area of the semicircle we must use the formula for finding the area of a circle and divide it by two since it's a semicircle.
The radius of the semicircle is 3, because the diameter is 6 and half of the diameter is the radius so half of 6 is 3.
A = pi*r^2/2
A = 3.14 x 3^2/2
A = 3.14 x 9/2
A = 28.26/2
A = 14.3
Now we must find the area of the triangle,
And the formula for area of a triangle is;
A = BH x 1/2
The base is 6, and the height is 10.
So:
A = BH x 1/2
A = (6 x 10) x 1/2
A = 60 x 1/2
A = 60/2
A = 30, now we must add the total of the two areas;
14.3 + 30 = 44.3 square feet
