5 PROPERTIES OF
PARALLELOGRAMS
€ Opposite sides are parallel
€ Opposite sides are congruent
€ Opposite angles are
congruent
€ Consecutive angles are
supplementary
INPUT PICTURES THAT DESCRIBE
THE PROPERTIES OF “RECTANGLE,
SQUARES, RHOMBUS &
QUADRILATERAL” (USE NOTES)
RECTANGLES
Four congruent angles
90° each
Diagonals are congruent. Area = base X height
SQUARES
Four congruent angles
Four congruent sides
Area = side2
Diagonal length = 𝑠 2
RHOMBUS
Congruent sides
Each of the diagonals are perpendicular bisector of the other. Area = base X altitude (height)
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Or Area =
!
€ The diagonals bisect each
other
QUADRILATERALS
(a) Four-sided polygon
(b) Sum of four interior
angles = 360°
RECTANGLE
SQUARE
RHOMBUS
P
A
R
A
L
L
E
L
O
G
R
A
M
S
&
Q
U
A
D
R
I
L
A
T
E
R
A
L
S