Lines
Classify Angles
Angle Pairs
Polygons
Angle Sums
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 sum of the interior angles of a triangle
What is 180 degrees?
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

an 8 sided closed figure

What is an octagon?

200
The sum of the interior angles of a 4 sided figure
What is 36o degrees
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
The sum of the interior angles of a pentagon
What is 540 degrees.
400

A lines that intersects two other parallel 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
The sum of the interior angles of a hexagon
What is 720 degrees?
500

A straight line which links two points without extending beyond them (what we normally consider a line but mathematically is really...)

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 four sided closed figure

What is a quadrilateral?

500
The sum of the interior angles of an octagon
What is 1080 degrees?
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