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Geometry Voc.
Geometry voc. word list
40
Mathematics
7th Grade
01/27/2013
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Term
Origin
 Definition
Point (0,0) on the coordinate plane
Term
Quadrants
 Definition
Areas of the coordinate plane I,II,III,IV
Term
Axes
 Definition
Horizontal and vertical number lines
Term
Ray
 Definition
Two rays that connect at the same point
Term
vertex
 Definition
The point on an angle where two rays meet
Term
Degrees
 Definition
The units angles are measures in
Term
Straight Angle
 Definition
Measures 180
Term
Acute Angle
 Definition
Measure less than 90
Term
Obtuse Angle
 Definition
Measures between 90-180
Term
Right Angle
 Definition
Measures exactly 90
Term
Complementary
 Definition
Two angles that sum to 90
Term
Supplementary
 Definition
Two angles that sum to 180
Term
Adjacent Angles
 Definition
Two angles that share a side
Term
Vertical Angles
 Definition
Opposite angles that have the same measure
Term
Intersecting Lines
 Definition
Two lines that meet at a point
Term
Parallel Lines
 Definition
Two lines that never intersect
Term
Perpendicular Lines
 Definition
Two lines that meet at a 90 angle
Term
Corresponding Angles
 Definition
Angles in the same positions when a line intersects two parallel lines
Term
Acute Triangle
 Definition
Has three acute angles
Term
Right Triangle
 Definition
Has one right angle
Term
Obtuse Triangle
 Definition
Has one obtuse angle
Term
Equilateral Triangle
 Definition
Has three congruent sides
Term
Isosceles Triangle
 Definition
Has at least two congruent sides
Term
Scalene Triangle
 Definition
Has no congruent sides
Term
Quadrilateral
 Definition
Any four sided figure
Term
Polygon
 Definition
A geometric figure that has three or more sides
Term
Parallelogram
 Definition
A quadrilateral with two pairs of parallel sides
Term
Rhombus
 Definition
A parallelogram with four congruent sides
Term
Trapezoid
 Definition
A quadrilateral with one pair of parallel sides
Term
Square
 Definition
A parallelogram with four right angles and four congruent sides
Term
Rectangle
 Definition
A parallelogram with four right angles
Term
similar
 Definition
same shape but not necessarily same size
Term
Congruent
 Definition
same size and same shape
Term
Circumference
 Definition
The distance around the circle
Term
Radius
 Definition
Half the distance across a circle through the center
Term
Diameter
 Definition
The distance across a circle through the center
Term
Translation
 Definition
Slide
Term
Reflection
 Definition
Flip or mirror images
Term
Rotation
 Definition
Turn about a fixed point
Term
Dilation
 Definition
Enlarging or reducing a figure by a scale factor
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