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# chapter11 vocab.

### VOCABULARY

TermDefinition
Adjacent Angles Two angles that have the same vertex, share a common side, and do not overlap.
circumference The distance around a circle.
Alternate Exterior Non-Adjacent exterior angles found on opposite si9desof the traversal.
Alternate interior Non-Adjacent exterior angles found on opposite sides of the traversal.
Congruent line segments that have the same length,or angles that have the same measure or figures that have the same size and shape.
Diameter Distance across a circle
Exterior angles Four of the angles formed by the traversal and two parallel lines. Exterior angles lie outside the two parallel lines.
perpendicular lines lines that intersect to form a right angle.
PI The ratio of the circumference of a circle to the diameter of the circle. 3.14
Radius The distance from the center to any point on the circle.
Traversal A line that intersects two parallel lines to form eight angles.
Trapezoid A quadrilateral with exactly one pair of parallel sides.
Rhombus A parallelogram with four congruent sides.
Parallelogram A quadrilateral with opposite sides parallel and congruent.
complementary angles Two angles are complementary if the sum of there measures are 90*.
supplementary Angles Two angles are supplementary if the sum of their measure is 180*.
corresponding Angles Angles that have the same position on two different parallel lines. Cut by traversal.
Interior angles Four of the angles formed by the traversal and two parallel lines. Interior angles lie between the two parallel lines.
parallel lines Lines that don't intersect
polygon A simple closed figure in a plane formed by three or more line segments.
Quadrilateral closed figure with four sides and four vertices. including squares, rectangles, and trapezoids.
Rotation A transformation where a figure is turned around a fixed point. Also called a turn.
Vertical angles Two pairs of opposite angles formed by two intersecting lines. The angles formed are congruent.
Rectangle A parallelogram with four right angles.
square a parallelogram with all sides congruent and four right angles.
Created by: victoria.ryker47