Lines
Classify Angles
Angle Pairs
Polygons
Circles
100
Lines that never touch
What are parallel lines?
100
An angle whose measure is less than 90 degrees.
What is an acute angle?
100
these angles share a common vertex and are equal.
What are vertical angles?
100
a 3 sided closed figure
What is a triangle?
100

The point in the middle of the circle 

What is the center?

200
lines that cross.
What are intersecting lines?
200
an angle whose measure is greater than 90 degrees
What is an obtuse angle?
200
when 2 parallel lines are cut by a transveral, these angles are in the same relative location and they are equal
What are corresponding angles?
200
a 7 sided closed figure
What is a heptagon?
200

The distance around a circle

What is the circumfernece?

300
Lines that intersect to form right angles.
What are perpendicular lines?
300
an angle whose measure is equal to 180 degrees
What is a straight angle?
300
when 2 parallel lines are cut by a transveral, these angles are outside the parallel lines and on opposite sides of the transversal and they are equal
What are alternative exterior angles?
300
a 6 sided closed figure
What is a hexagon?
300

A line segment from the center to the circle

What is a radius?

400
A lines that intersects two other lines.
What is a transversal?
400
A tool used to measure the degree of an angle
What is a protractor?
400
two angles whose sum of their measures equals 180 degrees
What are supplementary angles?
400
a five sided closed figure
What is a pentagon
400
A line that touches exactly one point on a circle

What is a tangent?

500
A straight line which links two points without extending beyond them
What is a line segment?
500
an angle whose measure is equal to 90 degrees
What is a right angle?
500
when 2 parallel lines are cut by a transveral, these angles are inside the parallel lines and on opposite sides of the transversal and they are equal
What are alternate interior angles?
500
a nine sided closed figure
What is a nonagon
500

A section of a circle created by two radii and an arc (shaped like a slice of pizza)

What is a sector?

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