Teacher said I have to learn my quadrilaterals now
I said I’d like to help you ma’am but I really don’t know how
She said I only have to look at the angles and the lines
Cause that’s how quadrilaterals are defined

(chorus) A trapezoid got a pair of parallel sides and a parallelogram got two
A rhombus got four equal sides, I’ll count them out for you
Squares and rectangles got right angles like a window or a door
But I don’t know what a quadrilateral’s for, one two three four!

A quadrilateral’s any polygon that’s got four sides
To find the area just multiply how high it is by how wide
To get perimeter simply measure the sides and find the sum
And here’s the part where the definitions come

(repeat chorus)

Squares and rectangles are defined by perpendicular lines
The square’s got the stricter definition: it’s got four equal sides
So a square is a rhombus and a parallelogram and a rectangle to boot
Its angles are neither obtuse nor acute

(repeat chorus)

A quadrilateral’s got four angles for 360 degrees
You can add three angles and subtract from 360 to get a missing angle with ease
So just remember the sides and the angles are your most important tools