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Geo Vocab
Geometry Vocaulary
| Term | Definition |
|---|---|
| line | a set of points that continue in both directions without end |
| line segment | part of a line with two endpoints |
| ray | part of a line that has one endpoint and continues in the other direction without end |
| point | an exact location in space; has no size |
| parallel lines | lines that never intersect |
| intersecting lines | lines that cross |
| perpendicular lines | lines that intersect at 90 degree angles |
| angle | 2 rays with a common endpoint |
| acute angle | an angle that is less than 90 degrees |
| right angle | an angle that is exactly 90 degrees |
| straight angle | an angle that measures 180 degrees |
| 360 degrees | the number of degrees in a circle |
| obtuse angle | an angle that measures greater than 90 degrees but less than 180 degrees |
| circle | a set of points that are equidistant (the same distance) from a common point called the center; named by its center point |
| chord | a line segment in a circle with both endpoints on the circle |
| diameter | a line segment in the circle with both endpoints on the circle, and it passes through the center |
| radius (radii - plural) | a line segment in a circle with one endpoint on the circle and one endpoint on the center (1/2 the diameter) |
| polygon | a closed figure made of line segments that do not intersect |
| triangle | three-sided polygon |
| obtuse triangle | triangle with 1 obtuse angles and 2 acute angles |
| acute triangle | triangle with 3 acute angles |
| right triangle | triangle with 1 right angle and 2 acute angles |
| equilateral triangle | triangle with 3 congruent sides |
| congruent | exact same size and shape |
| scalene triangle | triangle with no congruent sides |
| isosceles triangle | triangle with at least 2 congruent sides |
| quadrilateral | four-sided polygon |
| parallelogram | a quadrilateral with 2 pairs of parallel sides |
| rhombus | a parallelogram with 4 congruent sides |
| rectangle | a parallelogram with 4 right angles |
| square | a parallelogram with 4 congruent sides and 4 right angles |
| trapezoid | a quadrilateral with only one pair of parallel sides |
Created by:
dgiordano
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