Classified by angles

Right Triangle-has one 90 degree angle

Acute Triangle-all angles are less than 90 degrees

Obtuse Triangle-has one angle more than 90 degrees

Classified by sides

Scalene Triangles-no sides are the same

Equilateral Triangles-all sides are the same

Isosceles Triangle-at least two sides are the same

Special Segments of Triangles

Altitude-a perpendicular segment from a vertex to the opposite side or to a line containing the opposite side

Median-connects the vertex to the midpoint of the opposite side.

Angle Bisector in a triangle-cuts an angle in half.

Kite-A quadrilateral with two different pairs of consecutive congruent sides.

Trapezoid-A quadrilateral with exactly one pair of parallel sides.

Parallelogram-A quadrilateral with two pairs of parallel sides

Rectangles-A quadrilateral with two pairs of parallel sides and all angles congruent

Rhombus-A quadrilateral two pairs of parallel sides and all sides congruent

Square-A quadrilateral with two pairs of parallel sides, all sides congruent, and all angles congruent; a regular quadrilateral

Right Triangle-has one 90 degree angle

Acute Triangle-all angles are less than 90 degrees

Obtuse Triangle-has one angle more than 90 degrees

Classified by sides

Scalene Triangles-no sides are the same

Equilateral Triangles-all sides are the same

Isosceles Triangle-at least two sides are the same

Special Segments of Triangles

Altitude-a perpendicular segment from a vertex to the opposite side or to a line containing the opposite side

Median-connects the vertex to the midpoint of the opposite side.

Angle Bisector in a triangle-cuts an angle in half.

Kite-A quadrilateral with two different pairs of consecutive congruent sides.

Trapezoid-A quadrilateral with exactly one pair of parallel sides.

Parallelogram-A quadrilateral with two pairs of parallel sides

Rectangles-A quadrilateral with two pairs of parallel sides and all angles congruent

Rhombus-A quadrilateral two pairs of parallel sides and all sides congruent

Square-A quadrilateral with two pairs of parallel sides, all sides congruent, and all angles congruent; a regular quadrilateral