Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
polygon
|
A closed figure with 3 or more sides and each side intersetcs (touches) 2 other sides
|
|
|
concave polygon
|
At least one vertex "caves in" to the polygon
|
|
|
convex polygon
|
All of the verteces point out
|
|
|
regular polygon
|
Is equangular (all angles equal) & equilateral (all sides congruent-equal)
|
|
|
triangle
|
A polygon with 3 sides.
|
|
|
quadrilateral
|
A polygon with 4 sides.
|
|
|
pentagon
|
A polygon with 5 sides.
|
|
|
hexagon
|
A polygon with 6 sides.
|
|
|
heptagon
|
A polygon with 7 sides.
|
|
|
octogon
|
A polygon with 8 sides
|
|
|
nonagon
|
A polygon with 9 sides.
|
|
|
decagon
|
A polygon with 10 sides.
|
|
|
dodecagon
|
A polygon with 12 sides.
|
|
|
n-gon
|
A polygon with n number of sides.
|
|
|
vertex / verteces
|
Any point where two sides of a polygon or angle meet.
|
|
|
Acute Angle
|
Angle whose measure is less than < 90 degrees.
|
|
|
Right Angle
|
Angle whose measure is exactly 90 degrees.
|
|
|
Obtuse Angle
|
Angle whose measure is greater than > 90 degrees and less than < 180 degrees.
|
|
|
Straight Angle
|
Angle whose measure is exactly 180 degrees. It makes a straight line.
|
|
|
Interior Angle
|
An angle that faces inside of a polygon and is formed at the vertex of each two sides.
|
|
|
Exterior Angle
|
An angle that is adjacent to an interior angle but on the outside of the polygon.
|
|
|
complementary angles
|
Two angles whose sum of their measures is 90 degrees. They form a right angle when next to each other.
|
|
|
supplementary angles
|
Two angles whose sum of their measures is 180 degrees. They form a straight line when next to each other.
|
|
|
linear pair
|
Two adjacent angles that form a straight line. -supplementary angles
|
|
|
vertical angles
|
A pair of angles that lie in opposite positions when formed by two intersecting (crossing) lines.
|
