Find the area of a circle with a radius of 8 cm. Use 3.14 for pi. Type your answer as a number only.
Find the area of a triangle with a base of 6 cm and a height of 3 cm. Remember your formula.
Question 4
Find the area of a figure with base #1 of 4 in., base #2 of 6 in. and a height of 10 in.
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To find the area of a circle, we use the formula A = π * r^2, where A represents the area and r represents the radius of the circle. In this case, the given radius is 8 cm.
So, to find the area, we substitute the values into the formula:
A = 3.14 * (8 cm)^2
First, we square the radius:
A = 3.14 * (64 cm^2)
Then, we multiply by π:
A = 200.96 cm^2
Therefore, the area of the circle is 200.96 cm^2.
To find the area of a triangle, we use the formula A = 1/2 * b * h, where A represents the area, b represents the base length, and h represents the height. In this case, the given base is 6 cm and the height is 3 cm.
So, to find the area, we substitute the values into the formula:
A = 1/2 * 6 cm * 3 cm
First, we multiply the base and height:
A = 1/2 * 18 cm
Next, we divide by 2 to find 1/2 of the product:
A = 9 cm
Therefore, the area of the triangle is 9 cm.
To find the area of the figure with two bases and a height, we use the formula for the trapezoid. The formula for the area of a trapezoid is A = 1/2 * (b1 + b2) * h, where A represents the area, b1 and b2 represent the lengths of the two bases, and h represents the height.
In this case, the given base lengths are 4 inches and 6 inches, and the height is 10 inches.
So, to find the area, we substitute the values into the formula:
A = 1/2 * (4 in + 6 in) * 10 in
First, we add the two base lengths:
A = 1/2 * 10 in * 10 in
Next, we multiply the two base lengths and divide by 2 to find half the product:
A = 50 in^2
Therefore, the area of the figure is 50 square inches.
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A=π(8)2=64π sq.in.
64 pi
1)
A = pi * r^2
2)
A = (1/2)bh
3)
A = ½(a+b) * h