Vocabulary Word: Supplementary Angles Definition: Two angles whose sum is 180°.

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Presentation transcript:

Vocabulary Word: Supplementary Angles Definition: Two angles whose sum is 180°.

Vocabulary Word: Radius Definition: A line segment with one endpoint at the center of a circle and the other endpoint on the circle.

Vocabulary Word: Parallel Lines Definition: Two lines that never intersect and have the same slope.

Vocabulary Word: Line OR Definition: A straight path in a plane that goes on forever in opposite directions.

Vocabulary Word: Acute Angle ∠ABC or ∠CBA or ∠B Definition: An angle that has a measure greater than 0° and less than 90°.

Vocabulary Word: Ray Definition: A part of a line, with one endpoint, that continues without end in one direction.

Vocabulary Word: Vertex (Plural: Vertices) Definition: The point where two or more rays meet; the point of intersection of two sides of a polygon; the point of intersection of three or more edges of a solid figure; the top point of a cone.

Vocabulary Word: Perpendicular Lines Definition: Two lines that intersect to form right angles.

Vocabulary Word: Point A, B, C, P Definition: A precise location or place on a plane, having no size and no width.

Vocabulary Word: Plane Definition: A flat, two-dimensional surface.

Vocabulary Word: Line Segment (or Segment) Definition: Two endpoints A and B and all of the points lying on the line between them.

Vocabulary Word: Intersect Definition: Two or more geometric figures if they have one or more points in common.

Vocabulary Word: Obtuse Angle Definition: An angle with the measure greater than 90° but less than 180°.

Vocabulary Word: Complementary Angles Definition: Two angles whose sum is 90°.

Vocabulary Word: Collinear D,E, and G are collinear on line p, but F is not. Definition: Points that lie on the same line.

Vocabulary Word: Linear Pair Definition: Two angles that sum to 180° AND are directly next to each other.

Vocabulary Word: Vertical Angles Definition: Each of the pairs of opposite angles created by two intersecting lines.

Vocabulary Word: Coplanar Definition: Points or lines that lie on the same plane.

Vocabulary Word: Adjacent Angles Definition: Two angles that share a common side and a common vertex.

Vocabulary Word: Straight Angle Definition: An angle measuring exactly 180°.