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Polygon

A simple, closed 2- Dimensional shape made up of straight lines.

Quadrilateral

A polygon with exactly 4 sides.

Kite

A quadrilateral that has 2 sets of adjacent and congruent sides.

Rhombus

A parallelogram with 4 congruent sides.

Complementary Angles

Two angles whose sum is 90 degrees.

Parallel Lines

Two or more lines that never intersect and lie in the same plane

Polyhedron

A 3-D solid made up of a collection of polygons joined together at their edges.

Hemisphere

The exact half of a sphere.

Altitude

The height of a triangle or a perpendicular segment from a vertex to its opposite side

Median of a Triangle

A line joining a vertex to the midpoint of the opposite side

Midpoint

The point in the middle of a line segment (same distance from each endpoint)

Circumscribed Circle

A circle that contains a figure inside with all vertices of the figure are points on the circle.

Orthocenter

The point where the altitudes of a triangle intersect.

Triangle

A polygon with exactly 3 sides

Parallelogram

A quadrilateral with 2 pairs of parallel sides.

Trapezoid

A quadrilateral with one pair of parallel sides.

supplementary Angles

Two angles whose sum is 180 degrees.

Perpendicular Lines

Two lines that come together to form a right angle.

Congruent

Polygons with the same angles and all corresponding sides are the same.

Transveral

Two lines intersected by a thrid line.

Dihedral Angle

The angle formed by the union of polygonal regions in space that share the same edge.

Dodecagon

A polygon with 12 sides.

Bisect

To cut in half to form two equal parts finding the midpoint.

Medial Triangle

The triangle formed when joining the three midpoints of the sides of a triangle.

Angle Bisector

A line segment that divides an angle into two congruent angles.

Foot of the Perpendicular

The point where perpendicular lines intersect.

Centroid

The point where the medians of a triangle intersect.

Inscribed Angle

Two chords of an a circle sharing an endpoint.

Similar

Polygons in which all corresponding angles are congruent and all corresponding sides are proportional.

Net

A 2-D representation of a 3-D figure that will fold into the 3-D shape.

About this deck

Author: Devin B.

Created: 2010-10-11

Updated: 2011-07-05

Size: 30 flashcards

Views: 36

Created: 2010-10-11

Updated: 2011-07-05

Size: 30 flashcards

Views: 36

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