geometry scrapbook...woo!!!!!

Kirby Reyes

An angle is two rays that share a common endpoint.

supplementary angle

This is two angles that add up to 180 degrees

intersecting lines

this is pretty self explanatory  two lines that intersect

triangle

A polygon with three sides.

Cone

a solid or hollow object that tapers from a circular or roughly circular base to a point.

Circle

The locus of all points that are a fixed distance from a given point.

Point

The geometric figure formed at the intersection of two distinct lines.

Obtuse Angle

An angle that has measure more than 90° and less than 180°.

Kite

A quadrilateral with two pairs of adjacent sides that are congruent. Note that the diagonals of a kite are perpendicular.

Cylinder

A three-dimensional geometric figure with parallel congruent bases. The bases can be shaped like any closed plane figure (not necessarily a circle) and must be oriented identically.

Square

A rectangle with all four sides of equal length. Formally, a square is a quadrilateral with four congruent sides and four congruent angles (all 90°).

Cube

A regular polyhedron for which all faces are squares.

Sphere

A three dimensional solid consisting of all points equidistant from a given point. This point is the center of the sphere. Note: All cross-sections of a sphere are circles.

Hexagon

A polygon with six sides.

Octagon

A polygon with eight sides.

Ray

A part of a line starting at a particular point and extending infinitely in one direction.

Decagon

A polygon with ten sides.

Pyramid

A polyhedron with a polygonal base and lateral faces that taper to an apex. A pyramid with a triangular base is called a tetrahedron

Trapazoid

US usage, definition 1: A quadrilateral which has a pair of opposite sides which are parallel. The parallel sides are called the bases, and the other two sides are called the legs.

US usage, definition 2: A quadrilateral which has one parallel pair of opposite sides and one non-parallel pair of opposite sides. The parallel sides are called the bases, and the other two sides are called the legs.

Line

The geometric figure formed by two points. A line is the straight path connecting two points and extending beyond the points in both directions.

Plane

A flat surface extending in all directions. Any three noncollinear points lie on one and only one plane. So do any two distinct intersecting lines. A plane is atwo-dimensional figure.

Prism

A solid with parallel congruent bases which are both polygons. The bases must be oriented identically. The lateral faces of a prism are all parallelograms or rectangles.

Semicircle

Half a circle. That is, a 180° arc.

Rhombus

A parallelogram with four congruent sides. Note that the diagonals of a rhombus are perpendicular (as is the case with all kites).

Note: A square is a special kind of rhombus.

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