Download Adjacent Angle

Geometry Vocabulary: 7th Grade
1. 2-Dimensional: A shape that only has width and height and no thickness.
2. 3-Dimensional: An object that has height, width, and depth, like any object in the real
world.
3. Adjacent Angle: Angles that have the same vertex and a common side.
4. Complimentary Angle: Two angles whose measures added together equal 90 degrees.
5. Corresponding Angles: Angles formed when a line intersects two parallel lines. They are
congruent.
6. Supplementary Angles: Two angles whose measures equal 180 degrees.
7. Vertical Angles: Angles formed opposite one another when two lines intersect. They
are congruent.
8. Arc: A portion of the edge of a circle between any two points on the circle.
9. Area: The number of square units it takes to completely cover a space or surface.
10.Bases of a Prism: The two faces formed by congruent polygons that lie in parallel
planes, all of the other faces being parallelograms.
11.Bisect: To divide into two congruent parts.
12.Chord: A line segment having endpoints on a circle.
13.Circumference: The distance around a circle.
14.Circle: A closed curve in which all points on the edge are equidistant from the center.
15.Compass: A tool for drawing circles.
16.Composing: Putting two or more geometric figures together.
17.Cube: A 3-D figure having six congruent square faces.
18.Cubic Units: Volume of the solids is measured in these.
19.Cylinder: A 3-D figure having two congruent circular bases.
20.Degree: A unit of measure used in measuring angles.
21.Diameter: A line segment which has its endpoints on the circle and which passes
through the center.
22.Decomposing: subdividing a polygon
23.Edge: The intersection of a pair of faces in a three-dimensional figure.
24.Equilateral: Having sides equal in length.
25.Face: A plane region serving as a side of a 3-D object.
26.Isosceles Triangle: A triangle which has two of its sides equal in length.
27.Kite: A quadrilateral with two distinct pairs of equal adjacent sides.
28.Lateral Faces: In a prism, a face that is not a base of the figure.
29.Net: A two-dimensional figure that, when folded, forms the surfaces of a threedimensional object.
30.Parallelogram: A quadrilateral with both pairs of opposite sides parallel.
31.Polyhedron: A 3-dimensional figure that has polygons as faces.
32.Prism: A polyhedron with two parallel and congruent faces, called bases, and all other
faces that are parallelograms.
33.Protractor: An instrument for measuring angles.
34.Pyramid: A 3-D figure having one polygonal base and triangular faces.
35.Quadrilaterals: A 4-sided polygon.
36.Radius: A line segment having one endpoint at the center of a circle and the other on
the edge.
37.Rectangle: A 4-sided polygon where all interior angles are 90°.
38.Rectangular prism: A 3-dimensional object which has six faces that are rectangles.
39.Rhombus: A quadrilateral with all four sides equal in length.
40.Right Triangle: A triangle where one of its interior angles is a right angle (90 degrees).
41.Scalene Triangle: A triangle where all three sides are different in length.
42.Similarity: A property of geometric figures having angles of the same size.
43.Skew lines: Lines that are not in the same plane and do not intersect.
44.Square: A quadrilateral that has four right angles and four equal sides.
45.Surface area: The total area of the 2-dimensional surfaces that make up a 3-dimensional
object.
46.Transversal: A line that cuts two or more parallel lines
47.Trapezoid: A quadrilateral which has at least one pair of parallel sides.
48.Triangular prism: A solid (3-dimensional) object which has five faces: three rectangles
and two bases.
49.Vertices: The common endpoint of two or more rays or line segments
50.Volume: The amount of space occupied by an object.