Monday Practice

New Vocab

100

The set of all points on a plane that are a fixed distance from a center

Circle

200

Distance from the center of a circle outwards

Radius

300

Distance straight across a circle, through the center

Diameter

400

The distance around a circle

Circumference

500

A part of the circumference of a circle

Arc

Circle+

100

What's longer, a circle's radius or its diameter?

Diameter

200

How do you find the area of a circle?

A = Pi * radius²

300

What is the term for 'half a circle'?

Semicircle

400

If you take a 1/4 slice of a circle, you have a _________.

Quadrant

500

Explain how we got the value 'Pi' from the circle.

Pi = Circumference / Diameter

Solve It

100

I'm a circle and my radius is 16.1 cm. What is my diameter?

Diameter = 32.2 cm.

200

I'm a circle and my radius is 16.1 cm. What is my circumference? (round to the nearest hundredth)

Circumference = 101.11 cm

300

I'm a circle and my radius is 16.1 cm. What is my area? Round to the nearest hundredth.

Area = 813.92 cm²

400

I'm a circle and my area is 500cm². What is my circumference? (round to the nearest tenth)

Circumference = 79.2 cm

500

A circle is actually a special case of an __________ (hint: stretched circle)

ellipse

Random

100

3^x = 5

x = log(5) / log(3)

200

What is the shape of a quadratic function?

parabola