This is the name one can call all 4-sided polygons.
What is quadrilateral?
This is what we call all 4-angled polygons.
What are quadrilaterals?
This is what we call 3-sided polygons.
What are triangles?

This is what we call 3-angled polygons.
What are triangles?

This quadrilateral has four congruent angles and 4 congruent sides.
What is a square?

These 2 quadrilaterals always have 4 right angles.
What are the square and the rectangle?
These triangles have 3 equal sides.

What are equilateral triangles?
This is how we would classify this triangle by it's angles.

What is an acute triangle?
These are the two names I could call this 4-sided polygon.
What is quadrilateral and trapezoid or isosceles trapezoid
This quadrilateral has only one pair of parallel sides.
What is the trapezoid?

These triangles have 2 sides that are equal.
What are isosceles triangles?
This is how we would classify this triangle by it's angles.
![]()
What is a right triangle?
This is the only name for these two 4-sided polygons.
What are quadrilaterals?
These four quadrilaterals have 2 pairs of parallel sides.
What is the rhombus, rectangle, square, and parallelogram?

These triangles have no equal sides.

What are scalene triangles?
This is how we would classify this triangle by it's angles.

What is an obtuse triangle?
These are the two names we could call this 4-sided polygon.

What are quadrilateral and parallelogram?
These are the four names I could call this polygon.

What are quadrilateral, rhombus, rectangle, and square?
This is how we would classify this triangle by it's sides and angles.

What is an acute isosceles triangle?
This is how we would classify this triangle by it's sides and angles.
What is a scalene obtuse triangle?