Download 10 - Geometry Vocabulary

10
Geometry Vocabulary
Scale: the ratio between two sets of measurements
Scale Drawing: a drawing that uses a scale to make an object smaller than or larger than the
real object.
Dimensions: the length, width, or height of a figure.
Area: the area of a figure in the number of square units the figure encloses.
Angle: two lines joining at one point
Intersection: a point or set of points common to two or more geometric figures
Cross Section: the intersection of a three-dimensional figure and a plane.
Degree: the unit of measure for angles
Acute Angle: an angle less than 90⁰.
Right Angle: an angle equal to 90⁰.
Obtuse Angle: an angle greater than 90⁰.
Supplementary Angles: two angle are supplementary if the sum of their angle measures is
180⁰.
Complementary Angles: two angles are complementary if the sum of the angle measures is
90⁰.
Vertical Angles: vertical angles are formed by two intersecting lines and are opposite each
other.
Adjacent Angles: adjacent angles share the same vertex and a side, but have no interior points
in common.
Vertex of an Angle: the point of intersection of the rays that make up the sides of an angle.
Congruent Angles: angles that have the same measure.
Circumference: the distance around the circle.
Diameter: a segment that passes through the center of a circle from one side to the other side
(all the way across.)
Radius: a segment that has an end point at the center and the other end point on one side
(half way across.)
Composite Solids: the combination of two or more figures into one object.
Surface Area: the sum of the areas of all the sides of the shape.
Volume: the number of cubic units needed to fill a solid figure.
Polygon: a closed plane figure formed by three or more line segments that intersect only at
their endpoints