This is a right triangle

It's called a right triangle because it has one right angle and two acute angles

This is an Obtuse triangle

The obtuse triangle has one obtuse angle and two acute angles that's way it's called an obtuse triangle.

The acute triangle

The acute triangle has three acute that's way it's called a acute triangle.

The Scalene Triangle

The scalene triangle has no congruent sides or angles.

This is the isosceles triangle

The isosceles triangle it has two congruent sides and angles.

This is the equilateral triangle

The equilateral triangle has three congruent sides and angles.

The Quadrilateral

A four sided polygon.

The sum of all angles are 360 degrees.

The parallelogram


Opposite sides congruent

Opposite angles congruent

Opposite sides parallel

The rectangle