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geometry
Term | Definition |
---|---|
line | a long narrow line or band |
ray | Part of a line that has one endpoint and extends forever in one direction |
parallel lines | In a plane,lines that never cross and stay the same distance apart. |
perpendicular lines | Two lines that intersect to form square corners or right angle |
point | An exact location in a space |
line segment | Part of a line that has two endpoints |
plane | An endless endpoint |
angle | Two ray that have the same endpoint |
acute angle | An angle whose measure is between 0* and 90* |
right angle | An angle whose measure is 90* |
obtuse angle | An angle whose measure is between 90* and 180* |
straight angle | An angle measuring 180* |
vertex | The point of a cone |
protractor | An instrument used to measure and draw angles |
degrees | A unit of measure for angles and temp |
polygon | A closed plane figure made up of line segments |
regular polygon | A polygon that has sides of equal length a angle of equal measure |
triangle | A polygon with three sides |
quadrilateral | A polygon with four sides |
pentagon | A polygon with five sides |
hexagon | A polygon with six sides |
octagon | A polygon with eight sides |
equilateral triangle | A triangle whose sides are all equal |
isosceles triangle | A triangle whose two sides are equal |
scalene triangle | A triangle whose no sides are equal |
right triangle | A triangle which one angle is a right angle |
acute triangle | A triangle whose measure is between 0* and 90* |
obtuse triangle | A triangle in which one angle is an obtuse angle |
parallelogram | A quadrilateral with both pairs of opposite sides parallel |
trapezoid | A quadrilateral that has exactly one pair of parallel sides |
rectangle | A parallelogram with four right angles |
rhombus | A parallelogram that has sides the same length |
square | A rectangle with all sides the same length |
generalization | A general statement |