Circle- set of all points in a plane at given distance from a given point

radius- distance from the center of the circle to the edge of the circle

Center- the point directly in the middle of a circle

Chords- segment whose end points lie on the circle

diameter- chord that passes through the center of the circle, a diameter is the longest chord

Tanget- line that intersects the circle only once

congruent circles- circles that share the same center point, bullseye

point of tangency- where tangent touches the circle

arc- the continous space between two points on the circle, the two points are called endpoints of the arc, or arc AB

semicircle- an arc of circle whose endpoints are endpoints of a diameter, we name a semi circle using three letters with an arc symbole over the top

Minor arc- an arc of circle whose endpoints of a diameter, we name minor arcs using two letters with an arc over the top

major arc- an arc of a circle that is smaller than a semicircle, we name minor arcs using two letters with an arc over the top

arc measure- is the same as the central angle of that arc; we measure arcs in degrees

central angles- the angle with it’s vertex at the center of the circle and the sides passing through the end points of the arc measures in degrees

inscribed- a polygon that is completly inside another polygon where all edges or vertices are touching the outside polygon

circumscribed- a polygon is outside of another polygon where all edges are touching the outside polygon

concentric circle- circle that shares the same center point; bullsye

space geometry or solid geometry- study of 3d objects

space- set of all points, 3 dimensional

isometic drawing- 2 dimensional drawing of a 3 dimensional object, we use dashes to repersent lines that we would see if the object were a solid

Image- the result of moving all points of a figure in a transformation

transformation- a rule that assigns each point of a figure to another point of a plane

rigid transformation or isometry- a transformation that maintains size and shapes

nonrigid transformation- a transformation that does not maintain size and shape

translation- a transformation of an object by sliding it to a new location; each point is moved by the same translation vector; a rigid transformation

translation vector- a directed line segment from a point to its translacted image

Rotation- a transformation of an object in which each point is moved by the same angle measure in the same direction along a circular path about a fixed point; a rigid transformation

reflection- a transformation in which every point and its image are on opposite sides and the same distance from a fixed point.

Cross section- 2D figure formed by cutting into a solid figure (3D)