Polygons
A polygon with 3 sides
Triangle
A polygon with 8 sides
Octagon
Two angles that total 90 degrees are called this.
Complementary angles
Two angles that total 180 degrees are called this.
Supplementary Angles
180 degrees
A polygon with 10 sides
Decagon
A polygon with 12 sides
Dodecagon
If one angle measures 60 degrees, how much would its complement measure?
30 degrees
One angle measures 100 degrees. What is the measure of its supplement?
80 degrees
The 4 angles inside a quadrilateral add up to this amount.
360 degrees
A polygon with 4 sides
Quadrilateral or square
A polygon with 7 sides
Heptagon
a 90 degree angle can be marked with this symbol.
Square on the inside of the angle
One angle measures 130 degrees. What is the measure of its supplement?
50 degrees
One angle inside a triangle measures 90 degrees. Another angle measures 30 degrees. How much does the third angle measure?
60 degrees because the 3 angles need to add up to 180 degrees in all.
A polygon with 6 sides
Hexagon
True or false?
A shape that is not closed can still be a polygon.
False
If one angle measures 45 degrees, what is the measure of its complement?
45 degrees
This tool is used to measure angles.
Protractor
Two angles in a quadrilateral measure 90 degrees each. A third angle measures 60 degrees. How much does the 4th angle measure?
120 degrees because the 4 angles need to total 360 degrees in all.
A polygon with 5 sides
Pentagon
True or False?
A shape that has curved sides can still be a polygon.
False
One angle measures 50 degrees and another angle measures 30 degrees. Are they complementary?
No, they do not total 90 degrees when added together.
One angle measures 140 degrees and another angle measures 50 degrees. Are they supplementary?
No, because they do not total 180 degrees when added together.
True or false?
Quadrilaterals need to have 90 degree angles inside them.
False, the 4 angles can be different than 90 degrees each as long as they total 360 degrees when added together.