Circle Circumference
What is the value of "pi" 7th grade uses most often to solve problems?
3.14
What are the units of area if the radius is in centimeters?
centimeters squared
Name this circle relationship:
This is the line that crosses the circle from one side to the other through the midpoint.
Diameter
Describe this angle relationship:
Angles that are across from each other and equal in measure
Vertical Angles
Name this Angle Relationship:
These are angles that are less than 90 degrees.
Acute angle
Calculate the circumference of a circle with a diameter of 12 in.
37.88 in
Calculate the area if the radius is 3 cm.
28.26 cm2
Name this circle relationship:
The relationship between diameter and radius.
What is the radius is half of the diameter or the diameter is twice the radius?
Describe this angle relationship:
Angles that add up to 180 degrees
Supplementary
Name this Angle Relationship:
These angles are between 181-359 degrees.
What is a reflex Angle?
Calculate the circumference of a circle with a radius of 3 cm. Leave in terms of pi.
6(pi)
Calculate the area of a circle if the diameter is 10 ft.
78.5 ft2
Name this circle relationship:
Key words to describe the Circumference of a circle.
Perimeter
Fencing
Outer border
Rotations
Outer Edge
Distance around
Describe this angle relationship:
Angles that add up to 90 degrees
Complementary
If a Circumference, left in terms of pi, was 30pi, what is the radius of the circle?
Calculate the diameter of a circle with a circumference of 31.4 ft.
10 ft
What is the area of a circle if the circumference is 37.68 cm?
113.04 cm2
Key words to find the area of a circle.
Space inside
Amount covered
square units
Describe this angle relationship:
These angles are next to each other and share a common side.
Adjacent Angles
Using a protractor, how do I know which numbers to use when determining the measure of an angle?
Estimating the angle to be above or below 90 degrees will help you determine whether the angle could be 120 degrees or 60 degrees on a protractor, for example.
Calculate the radius of a circle with a circumference of 50.24 in.
8 in
How much larger is the area of circle with a 8 foot diameter than a 4 foot diameter?
What is 37.68 square feet?
If a circle is split into 10 equal parts, how many wedges would it take to make a right angle?
What is 2.5 wedges?
< A and <B are complementary angles. <A measures 15 degrees more than <B. Write an equation to represent the relationship between the two angles.
What is x + x + 15 = 90
OR
2x + 15 = 90
OR
2x = 75
1. If I have the measure of an angle and want to determine the measure of an angle vertical to it, how do I figure out it's measure?
1. Vertical angles are congruent- equal, so it would be the same measure.