click below
click below
Normal Size Small Size show me how
Geometry Terms
Term | Definition |
---|---|
angle | a shape formed by two rays that share the same endpoint |
closed shape | a two-dimensional shape that begins and ends at the same point |
line | a straight path extending in both directions with no endpoints |
open shape | a shape that does not begin and end at the same point |
plane shape | a shape on a flat surface that is formed by curves, lines segments, or both |
point | an exact position or location |
polygon | a closed plane shape with straight sides |
ray | a part of a line, with one endpoint, that is straight and continues in one direction |
right angle | an angle that forms a square corner |
two-dimensional shape | plane shapes that have length and width. |
acute angle | an angle less than a right angle |
obtuse angle | an angle greater than a right angle |
quadrilateral | a 4 sided shape |
pentagon | a 5 sided shape |
hexagon | a 6 sided shape |
octagon | an 8 sided shape |
decagon | a 10 sided shape |
intersecting lines | lines that cross or meet and form angles |
perpendicular lines | lines that cross or meet to form RIGHT angles |
parallel lines | lines that NEVER cross and will not form any angles |
rectangle | a 4 sided shape with 2 pairs of sides that are the same length and 4 right angles |
square | 4 sides that are the same length and 4 right angles. |
rhombus | 2 pairs of opposite sides that are parallel and 4 sides that are of equal length. |
trapezoid | exactly 1 pair of opposite sides that are parallel. |
congruent | being the same size and shape |
right triangle | a triangle that has one right angle |
acute triangle | a triangle that has all acute angles |
obtuse triangle | a triangle that has one obtuse angle |
parallelogram | a quadrilateral with 2 sets of parallel sides. opposite sides are congruent. |