Finding Area and Perimeter of Circles, Triangles, Rectangles

Select the correct formula for finding area of a circle

(a)  

• l x w

• b x h

What is the formula for calculating the area of a circle?

• 2πr

• πr^2

• 2πd

• πd

What formulas can be applied to solve problems involving composite plane figures?

• Diameter, radius, and area formulas

• Volume, surface area, and perimeter formulas

• Length, width, and height formulas

• Perimeter, circumference, and area formulas

What attribute is used to determine the area of subdivisions in a composite figure?

• Area

• Perimeter

• Volume

• Circumference

Which attribute is used to determine the perimeter of a composite plane figure?

• Circumference of the subdivisions

• Volume of the subdivisions

• Area of the subdivisions

How can the perimeter of a composite plane figure be calculated?

• By dividing the areas of the subdivisions

• By subtracting the areas of the subdivisions

• By multiplying the areas of the subdivisions

• By adding the perimeters of the subdivisions

Which procedure should be used to find the area of the shaded region?

• Find the circumference of the circle and then subtract the perimeter of the trianlge.

• Find the area of the circle and then subtract the area of the triangle.

• Find the circumference of the circle and then subtract the area of the triangle

• Find the area of the triangle and then subtract the perimeter of the triangle

How could you find the area of the shaded region?

• By adding the area of the small rectangle to the large rectangle

• By subtracting the area of the small rectangle from the large rectangle

• By only finding the area of the large rectangle

• By only finding the area of the small rectangle

How would you find the area of a quarter-circle?

• Find the area of the circle then divide by 2

• Find the area of the circle then divide by 4

• Find the area of the circle then subtract 2

• Find the area of the circle then multiply by 2

How would you find the area of a semi-circle?

• Find the area of the circle then divide by 2

• Find the area of the circle then divide by 4

• Find the area of the circle then subtract 2

• Find the area of the circle then multiply by 2