Area of Shaded Regions & Area of Irregular Polygons

How do you calculate the area of a circle with radius r?

• A = π × r

• A = 2πr

• A = πr^2

• A = πr^3

What is the formula for the area of a trapezoid?

• @@A = rac{1}{2} imes (b_1 + b_2) imes h@@

• @@A = b imes h@@

• @@A = rac{1}{2} imes (b_1 - b_2) imes h@@

• @@A = (b_1 + b_2) imes h@@

How do you find the area of a composite figure?

• Divide it into simpler shapes, calculate the area of each shape, and then sum those areas.

• Multiply the length and width of the entire figure.

• Use the formula for the area of a rectangle only.

• Estimate the area by measuring the perimeter.

What is the area of a semicircle?

• @@A = rac{1}{2} imes ext{π} imes r^2@@

• @@A = ext{π} imes r^2@@

• @@A = rac{1}{4} imes ext{π} imes r^2@@

• @@A = 2 imes ext{π} imes r@@

What is the formula for the area of a triangle?

• @@A = rac{1}{2} imes ext{base} imes ext{height}@@

• @@A = ext{base} imes ext{height}@@

• @@A = rac{1}{3} imes ext{base} imes ext{height}@@

• @@A = ext{base} + ext{height}@@

What is the relationship between the area of a square and its side length?

• The area of a square is given by the formula: @@A = ext{side}^2@@.

• The area of a square is equal to its perimeter.

• The area of a square is half of its side length.

• The area of a square is the sum of the lengths of its sides.

How do you find the area of an irregular polygon?

• By using the formula A = l × w

• By dividing it into regular shapes, calculating the area of each, and summing them up.

• By measuring the perimeter and multiplying by the height

• By approximating it as a rectangle and using the rectangle area formula

What is the area of a shaded region in a circle with radius 8 inches if the unshaded area is 16π in²?

• 32π in²

• 48π in²

• 64π in²

• 16π in²

What is the formula for the area of a circle?

• @@A = rac{1}{2} imes ext{diameter} imes ext{height}@@

• @@A = ext{radius}^2 imes ext{pi}@@

• @@A = ext{diameter}^2 imes ext{pi}@@

• @@A = 2 imes ext{radius} imes ext{height}@@

Define the term 'irregular polygon'.

• An irregular polygon is a polygon that does not have all sides and angles equal.

• An irregular polygon is a polygon with all sides equal and angles equal.

• An irregular polygon is a polygon that has at least one side longer than the others.

• An irregular polygon is a polygon that is always convex.