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Geometry

TermDefinition
Acute angle An angle with a measure greater than 0 degrees and less than 90 degrees.
Acute triangle A triangle that has three acute angles.
Adjacent angles Two angles that have the same vertex, share a common side, and do not overlap.
Angle Two rays with common endpoint form an angle. The rays and vertex are used to name an angle below is <ABC.
Arc A curved line part of a circle. An arc is part of the circumference of a circle.
Asymmetry An irregularity or imbalance in the spatial pattern or shape or arrangement of an object or figure.
Center of a circle A point inside the circle and is at an equal distance from all of the points on its circumference.
Center of rotation A fixed point around which shapes move in a circular motion to a new position.
Central angle An angle whose vertex is the center of a circle and whose side intersect the circle.
Chord A segment with endpoints that are on a circle.
Circle the set of all points in a plane that are the same distance from a given point called the center.
Complementary angles Two angles are complementary if the sum of their measures is 90 degrees
Congruent Line segments that have the same length, or angles that have the same measure, or figures that have the same size and shape.
Corresponding angles Angles that have the same position on two different parallel line cut by a transversal. In figure,<1 and <5, <2 and<6, <7, <4 and <8 are corresponding angle.
Diameter The distance across a circle through its center.
Equilateral triangle A triangle with all sides congruent.
Image Every corresponding point on a figure after its transformation.
Isosceles triangle A triangle that has at least two congruent sides.
Line A never ending straight path.
Line of reflection The line that is reflected over in a reflection.
Line of symmetry Each half of a figure is a mirror image of the other half when a line of symmetry is drawn.
Line segment Part of a line containing two endpoint and all the points between them.
Line symmetry
Obtuse angle An angle with a measure greater than 90 degrees but less than 180 degrees.
Obtuse triangle
Parallel lines
Created by: 00021335
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