math vocab
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42 terms
Terms | Definitions |
|---|---|
acute angle | an angle under 90 degrees |
acute triangle | a triangle with all acute angles |
angle | 2 rays that share a common endpoint |
central angle | angle that has the center of a circle its vertex |
chord | a line segment that connects 2 points on a circle |
circle | a set of points in a plane equidistant from a point called the origin or the center |
complementary angles | 2 angles that complete a right angle |
congruent | having the same measure |
diagonal | a line segment that connects 2 points not already connected |
diameter | a chord that goes through the origin |
equilateral triangle | a triangle that has all sides congruent |
isosceles triangle | a triangle that has 2 sides congruent |
scalene triangle | a triangle that has no sides congruent |
kite | a quadrilateral with a pair of pairs of adjacent congruent sides |
line | 1-D a straight path that extends infinetly in opposite directions |
line segment | a part of a line or ray that extends between 2 endpoints |
obtuse angle | an angle over 90 degrees |
obtuse triangle | a triangle with at least 1 angle over 90 degrees |
parallel lines | lines that are on the same plane and never intersect |
parallelogram | a quadrilateral with a pair of pairs of parallel lines |
perpendicular lines | lines that intersect at a right angle |
plane | 2-D, 3 points can name it and it extends infinetly in all directions |
point | 0-D, an exact location in space |
polygon | a closed figure made of three or more line segments |
radius | 1/2 of a diameter |
ray | has 1 endpoint and extends infinetly in the other direction |
rectangle | an equiangular figure |
reflection | when a figure flips across the line of reflection |
regular | equilateral and equiangular |
rhombus | a parallelogram,quadrilateral with all sides congruent |
right angle | angle at exactly 90 degrees |
right triangle | a triangle with one right angle |
rotation | when a figure turns around a fixed point |
sector | wedge shape created by the central angle |
skew lines | non collinear lines that don't intersect |
square | equilateral and equiangular polygon |
straight angle | a 180 degree angle |
supplementary angles | supply a straight angle |
transversal lines | intersect parallel lines |
trapezoid | 1 paip of parallel sides |
vertex | a common endpoint for 2 line segments or rays or angles etc. |
vertical angles | formed by two intersecting lines and are congruent |
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