Download Mysterious Quadrilaterals

Mysterious Quadrilaterals
Formulas for quadrilaterals
by Garrett Lee / Mr. Muir / Geometry / A
‘Normal’ Quadrilaterals
Hmm... nothing
I DON’T KNOW!
Special
What do we do with
this?
“We are getting easier.”
- Quadril-council
What’s coming next?
You’ll see...
Trapezoids
18 ft
•
Formula:
•
{(Top + Bottom) * Height} / 2
15 ft
25 ft
What about
me?
Example: {(18+25) * 15} / 2
= (33 * 15) / 2
= (495 / 2) ft²
*Isosceles trapezoids included*
Parallelogram
15 cm
12 cm
•
Formula:
•
Length * Height (Simple :)
Example: 15 x 12 = 180 cm²
Parallelogram’s Defeat
Although I should say...
two of the four sides are longer.
Square
Square
Rhombuses
Formula: (Length x Height) / 2
40 km
25 km
Example: (25 x 40) / 2
= 1000 / 2
= 500 km²
All sides have the same length!
Rectangles
Example
: 15 x 4 =
60 mm²
15 mm
RECTANGLE!!
Interesti
ng!
Formula:
Length x
Height
4 mm
All
angles
are 90
degrees!
WHAT
?!?
Trapezoids
Parallelogram
The Best One Is...
Rhombus
WHAT
?!?
RECTANGLE!!
SQUARES!
15 mi
Formula: (One side)² *So simple!*
Example: You guys can
figure that out.
Squares are
perfect!
All sides have the same length!
+
All the angles are 90 degrees!
Now, are we done?
Are we??
Song “Pentagons”
Thank you for
watching/listening!
By Garrett Lee