Exploring the Area of Circles Formula

What is the distance from the center of a circle to its edge called?

• Diameter

• Circumference

• Radius

• Area

What geometric shape is formed when a circle's pieces are rearranged?

• Hexagon

• Rectangle

• Triangle

• Parallelogram

Tags

CCSS.1.G.A.2

What part of the circle corresponds to the height of the rearranged figure?

• Radius

• Circumference

• Diameter

• Area

What is half of the circumference of a circle represented as in the formula?

• πr²

• r/2

• πr

• 2πr

Tags

CCSS.7.G.B.4

What is the formula for the circumference of a circle?

• C = r/2

• C = πd

• C = 2πr

• C = πr²

Tags

CCSS.7.G.B.4

How do you calculate half of the circumference of a circle?

• None of the above

• Multiply by π

• Divide by 2

• Multiply by 2

Tags

CCSS.7.G.B.4

What does the base of the rearranged circle represent?

• Radius

• Diameter

• Half of the circumference

• Full circumference

Tags

CCSS.7.G.B.4

Using the area formula for a parallelogram, how is the area of a circle derived?

• 2πr * r

• πr * πr

• πr * r

• Base * Height

Tags

CCSS.7.G.B.4

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

• A = 2πr

• A = r²

• A = πr²

• A = πr

Tags

CCSS.7.G.B.4

What does the height of the rearranged parallelogram-like shape represent?

• Area

• Circumference

• Radius

• Diameter