1 A1 Geometry Notation Point An exact position

1 A-1 Geometry Notation

Point An exact position or location in a given plane. A point has no length, width or height. Notation: A Say: Point A

Line The set of points between points P and Q in a plane and the infinite number of points that continue beyond the points. A line has no thickness. Notation . C Is there another way to name the same line? t

Line Segment A part of a line with two endpoints. Notation

Ray A part of a line that begins at a point and continues forever in one direction. . A R Y Notation:

Angle A figure created by two distinct rays that share a common endpoint, also known as a vertex Name 3 other ways to name this angle

Circle The set of all points equidistant from a given point.

Triangle A figure with 3 line segments as its sides. Y T R Notation

Name each as many ways as you can: 1. Line 2. Line segment 3. Ray 4. Angle

Intersection Union Just the elements in one set that are also in another set Everything in both sets Set A = { 1, 3, 5, 7} Set B = {1, 2, 3}

A C B

Name each intersection or union using the proper notation. 1. 5. 2. 6. 3. 7. 4. 8.

Name each intersection or union using the proper notation. 1. 5. 2. 6. 3. 7. 4. 8.

Draw a figure for the following:

Right Angle An angle that measures 90°.

Parallel Lines in a plane that either do not share any points and never intersect, or share all points. Written as

Perpendicular Line Two lines that intersect at a right angle (90°). Written as

Acute Angle An angle measuring less than 90° but greater than 0°.

Obtuse Angle An angle measuring greater than 90° but less than 180°.

How many squares are there? How many in a 3 x 3? How many in a 4 x 4? How many in nxn?