# Some terms & definitions. Angles, angle pairs, angle measure

Topic:
Angles, Terms
A series of applets about some terms/definitions. Angle classification, angle measurement with a protractor, angle pair relationships, sum of interior angles. Interior and exterior angles of a triangle
• ### Basic Geometric figures - illustration & 4 questions

• ### Point(s), a Line, Ray(s), Segment(s), & an angle - interactive & 3 questions

• ### Types of angles - the 5 classifications

• ### Animated acute angles

• ### Animated view of right angles.

• ### Animated view of obtuse angles.

• ### Animated view of straight angles.

• ### Animated view of reflex angles.

• ### Protractor Practice (Random)

• ### "Broken" Protractor

• ### Protractor Practice (Not Random)

• ### "proof" of the triangle sum theorem

• ### Sum of the interior angles in a triangle is always _

• ### Missing angle measure in a triangle

• ### Sum of the interior angles of a polygon

• ### Definition of complementary angles

• ### Missing complementary angle measure

• ### Supplementary angles - a pair of angles whose sum is always _

• ### What is the measure of an angle's supplement?

• ### Vertical angles

• ### Angles on one side of a line - parts of a straight angle

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