Two rays with a common endpoint.
A ray that is part of an angle.
The common endpoint of an angle.
The most common unit of measure for angles.
Less than 90°
Between 91°and 179°
Opposite and Congruent Angles.
Angles with the same measure.
Two (or more) angles that have the sum of 90°.
Two (or more) angles that have the sum of 180°.
All 3 angles are acute angles.
One angle is a right angle.
One angle is an obtuse angle.
The side of the triangle.
Line segments that have the same length.
No congruent sides.
At least two congruent sides.
All 3 congruent sides.
Sum of Angles in a Triangle
Angles add up to equal 180°.
A figure with four sides and four angles.
Opposite sides congruent, all angles are right angles, opposite sides parallel
All sides congruent, all angles are right angles, opposite sides parallel
Opposite sides congruent, opposite sides parallel, opposite angles congruent
All sides congruent, opposite sides parallel, opposite angles congruent
Exactly one pair of opposite sides parallel
Sum of angles in a quadrilateral
The angles add up to equal 360°.
Figures that have the same shape but not necessarily the same size.
Figures that have the same shape and same size.
The sides of congruent or similar figures that match.