Angles

A polygon with ll sides congruent

equilateral

acute angle

An angle whose measure is between 0 degrees and 90 degrees

The two rays that form an angle are called the _____ of the angle

sides

scalene triangle

A triangle with no two congruent sides

A parallelogram

...

vertex

A point where two or more straight lines meet.

protractor

A tool used to measure angles

equilateral triangle

A triangle where all sides are congruent or equal. All angles are equal. Each angle measures 60 degrees

vertical angles

Angles opposite one another at the intersection of two lines.

adjacent angles

Angles that have a common side and a common vertex (corner point).

congruent angles

Angles that have the same measure

A polygon with 10 sides

Decagon

The small at the vertex of a right angle indicates that it is a

Right angle

A triangle with a 90 degree angle is a

Right triangle

angle

The figure formed by two rays with the same endpoint.

supplementary angles

Two angles whose measures have a sum of 180 degrees.

complimentary angles

Two angles whose measures have a sum of 90 degrees.

isosceles triangle

a triangle or trapezoid with two congruent sides

degrees

a unit for measuring angles

obtuse angle

angle that is >90 degrees and <180 degrees.

straight angle

angle that measures exactly 180 degrees.

right angle

angle that measures exactly 90 degrees.

Two angles with the same measure are said to be

congruent

The basic unit by which angles are measured

degree

A polygon with 8 sides

octagon

A polygon with 5 sides

pentagon

A polygon with four sides

quadrilateral

A polygon with three sides

triangle

The intersection of two sides of an angle is called the angle's

vertex