By: Michael NguyenPeriod: PAP Geometry – 3

Due: 9-21-09 (A Day)

Acute angle Angle bisector An angle that is

greater than 0° and less than 90°

Line/ray that separates an angle into two congruent parts

Circle

Complementary angles

A shape with one curved line with a fixed distance from the center called the radius

2 angles whose measures add up to 90° (right angle)

Supplementary angles

Diameter

2 angles whose measures add up to 180° (Straight angle)

Length from one edge of a circle through the center to the other edge

Isosceles triangle

Line

A triangle whose sides include a pair of congruent sides and one side not congruent to the other

A straight path between two or more points with no thickness and extends forever

Midpoint

Obtuse angle

The middle point that separates a line segment into two equal parts

An angle with a measure greater than 90° and less than 180°

Parallel lines

Perpendicular lines

Two lines that exist on the same plane that will never intersect

Two lines that intersect to form a right (90°) angle

Plane Square

Defined by 3 non-collinear points and is a flat surface that extends forever

A quadrilateral with 4 congruent sides and 4 90° angles with opposite sides being parallel

Straight angle

Radius

An angle that measures 180°

The length from the center of the circle to the edge of the circle (half of diameter)

Rectangle

Right angle

A quadrilateral 4 right angles (has opposite congruent sides)

An angle that measures 90°

Right triangle

Segment

A triangle with at least one angle that measures 90°

A part of a line with two end points on each side with all points between it