Two rays with a common endpoint from an angle.
A ray that is part of an angle.
A unit for measuring angles.
The common endpoint of two rays that form an angle.
An angle that measures 90 degrees
an angle greater than 0 degrees but less than 90 degrees
an angle that measures greater than 90 but less than 180
A triangle which each angle measures mess then 90°
An angle that measure exactly 90°
An angle that measures more that 90° but less than 180°
Part of a line containing two endpoints all the points between them
Angles that have the same measure
A triangle with no congruent sides
A triangle with at least two congruent sides
A triangle having all three sides congruent and all three angles congruent.
Opposite angles formed by the intersection of two lines.
Having the same measure
Two angles are supplementary if the sum of their measures is 180°.
Two angles are complementary if the sum of their measures is 90°
A polygon having four sides
A polygon with four right angles
A parallelogram with four congruent sides and four right angles.
A quadrilateral with both pairs of opposite sides parallel and congruent.
A parallelogram with four congruent side
A quadrilateral with exactly one pair of parallel opposite sides.