Understanding Areas of Basic Plane Figures

What is the formula to calculate the area of a square?

• Pi times Radius squared

• Length times Width

• Base times Height divided by 2

• Side times Side

If a square has a side length of 9 decimeters, what is its area?

• 81 square decimeters

• 9 square decimeters

• 18 square decimeters

• 36 square decimeters

How do you calculate the area of a rectangle?

• Base times Height divided by 2

• Pi times Radius squared

• Length times Width

• Side times Side

A rectangle has a length of 9 meters and a width of 4 meters. What is its area?

• 28 square meters

• 36 square meters

• 45 square meters

• 13 square meters

What is the formula for the area of a triangle?

• Pi times Radius squared

• Base times Height divided by 2

• Length times Width

• Side times Side

A triangle has a base of 5 meters and a height of 8 meters. What is its area?

• 25 square meters

• 20 square meters

• 40 square meters

• 30 square meters

Which formula is used to find the area of a circle?

• Pi times Radius squared

• Side times Side

• Base times Height divided by 2

• Length times Width

If the radius of a circle is 2 inches, what is the area using pi as 3.14?

• 12.56 square inches

• 6.28 square inches

• 4 square inches

• 8 square inches

How do you calculate the area of a semicircle?

• Pi times Radius squared

• Pi times Radius squared divided by 2

• Length times Width

• Base times Height divided by 2

What is the area of a semicircle with a radius of 2 inches using pi as 3.14?

• 9.42 square inches

• 3.14 square inches

• 12.56 square inches

• 6.28 square inches