Course 3 Unit 6 Vocabulary

An angle that measures more than 0° but less than 90°

• acute angle

• obtuse angle

• right angle

• reflex angle

Two angles that are on the outside of two lines and are on opposite sides of a transversal

• alternate exterior angles

• corresponding angles

• vertical angles

• same side exterior angles

Two angles that are on the inside of two lines and are on opposite sides of a transversal

• alternate interior angles

• corresponding angles

• vertical angles

• adjacent angles

Two figures with all corresponding parts equal in measure

• congruent

• parallel

• perpendicular

• adjacent

Two non-adjacent angles that are on the same side of a transversal with one angle being interior and the other exterior.

• corresponding angles

• alternate interior angles

• vertical angles

• adjacent angles

A triangle in which all sides are congruent

• equilateral triangle

• isosceles triangle

• scalene triangle

• right triangle

An angle formed by extending one side of a shape, thus creating an angle on the outside of that shape

• exterior angle

• interior angle

• vertical angle

• adjacent angle

What is the term for a triangle that has two or more congruent sides?

• isosceles triangle

• scalene triangle

• right triangle

• equilateral triangle

What is the term for an angle that measures more than 90° but less than 180°?

• obtuse angle

• acute angle

• right angle

• reflex angle

What is the term for the two angles inside a triangle that are not adjacent to the exterior angle?

• remote interior angles

• adjacent angles

• vertical angles

• corresponding angles