The Basics
Triangles
Angles
Polygons
Misc.
100
a location
point
100
a triangle that has one right angle
right triangle
100
an angle that measures less than 90 degress
acute angle
100
a polygon with 3 sides
triangle
100
equal
congruent
200
a series of points extending forever
line
200
a triangle with at least two sides congruent
isosceles
200
an angle that measures more than 90 degrees
obtuse angle
200
a polygon with 4 sides
quadrilateral
200
coplanar lines that do not intersect
parallel lines
300
a part of a line consisting of two endpoints
segment
300
a triangle with no sides congruent
scalene triangle
300
an angle that measures 180 degrees
straight angle
300
a polygon with 5 sides
pentagon
300
lines or points that lie on the same plane
coplanar
400
part of a line consisting of one endpoint and all the points that go in the opposite direction
ray
400
triangle all three sides congruent
equilateral
400
angles that add up to 90 degrees
complementary angles
400
a polygon with 6 sides
hexagon
400
lines that intersect to form right angles
perpendicular lines
500
flat surface that goes on forever
plane
500
TRUE OR FALSE: An isosceles triangle is an equilateral triangle.
True
500
angles that add up to 180 degrees
supplementary angles
500
a polygon with 8 sides
octagon
500
noncoplanar lines that do not intersect
skew lines
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