Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
geometry definitons
Geometry definitons
| Question | Answer |
|---|---|
| acute triangle | A triangle in which all three angles are acute |
| angle | A figure formed by two rays that have a common endpoint |
| chord | A line segment with its endpoints on a circle |
| circle | A closed plane figure with all points on the figure the same distance from the center |
| circumference | The distance around a circle |
| closed figure | A figure that begins and ends at the same point |
| cone | A solid figure that has a circular base and one vertex |
| congruent | Having the same size and shape |
| congruent figures | Figures that have the same size and shape |
| coordinate plane | A plane formed by two intersecting and perpendicular number lines called axes |
| coordinates | The numbers in an ordered pair |
| cube | A solid figure with six congruent square faces |
| cylinder | A solid figure that has two parallel bases that are congruent circles |
| degree (°) | A unit for measuring angles and temperature |
| diameter | A line segment that passes through the center of a circle and has its endpoints on the circle |
| dimension | A measure in one direction; the length, width, or height of a figure |
| edge | The line segment where two faces of a solid figure meet |
| equilateral triangle | A triangle with three congruent sides |
| face | A polygon that is a flat surface of a solid figure |
| figurate numbers | Numbers that can be represented by geometric figures |
| hexagon | A polygon with six sides and six angles |
| hypotenuse | In a right triangle, the side opposite the right angle; the longest side in a right triangle |
| intersecting lines | Lines that cross at exactly one point |
| isosceles triangle | A triangle with two congruent sides |
| line | A straight path in a plane that goes on forever in opposite directions |
| line segment | A part of a line that includes two points, called endpoints, and all of the points between them |
| line symmetry | A figure has line symmetry if a line can separate the figure into two congruent parts |
| obtuse angle | An angle whose measure is greater than 90° and less than 180° |
| obtuse triangle | A triangle that has one obtuse angle |
| octagon | A polygon with eight sides |
| ordered pair | A pair of numbers used to locate a point on a coordinate plane; the first number tells how far to move horizontally and the second number tells how far to move vertically |
| parallel lines | Lines in a plane that never intersect |
| parallelogram | A quadrilateral whose opposite sides are parallel and congruent |
| pentagon | A polygon with five sides |
| perpendicular lines | Two lines that intersect to form four right angles |
| pi | The ratio of the circumference of a circle to its diameter |
| plane | A flat surface that extends without end in all directions |
| plane figure | A figure which lies in a plane |
| point | An exact location in space, usually represented by a dot |
| point symmetry | When a figure can be turned half way about a central point and still look the same |
| polygon | A closed plane figure formed by three or more line segments |
| polyhedron | A solid figure with flat faces that are polygons |
| prism | A solid figure that has two congruent, polygon-shaped bases, and other faces that are all rectangles |
| protractor | A tool used for measuring or drawing angles |
| pyramid | A solid figure with a polygon base and all other faces triangles that meet at a common vertex |
| quadrilateral | A polygon with four sides |
| radius | A line segment with one endpoint at the center of a circle and the other endpoint on the circle |
| ray | A part of a line, with one endpoint, that continues without end in one direction |
| rectangle | A parallelogram with four right angles |
| rectangular prism | A solid figure in which all six faces are rectangles |
| reflection (flip) | A movement of a figure to a new position by flipping it over a line |
| regular polygon | A polygon in which all sides are congruent and all angles are congruent |
| rhombus | A parallelogram with four congruent sides |
| right angle | An angle formed by perpendicular lines, line segments, or rays and with a measure of 90° |
| right triangle | A triangle with one right angle |
| rotation (turn) | A movement of a figure by turning it around a fixed point |
| rotational symmetry | The property of a figure that can be rotated less than 360° around a central point and still be congruent to the original figure |
| scale drawing | A drawing that shows a real object smaller than (a reduction) or larger than (an enlargement) the real object |
| scalene triangle | A triangle with no congruent sides |
| similar figures | Figures with the same shape but not necessarily the same size |
| solid figure | A three-dimensional figure |
| sphere | A solid figure that has the shape of a round ball; all points are the same distance from the center |
| square | A rectangle with 4 equal sides |
Created by:
brandonnichols
Popular Math sets