1. Combining Like-Terms with Perimeter and Area
Objective: SWBAT write expressions involving area and perimeter of figures.

2. Vocabulary
Perimeter is the sum of ALL the lengths of the sides
of a two dimensional shape
Area the amount of space (two dimensional)
inside a shape expressed in square units

3. For each of the following shapes:
a) write a simplified expression for the perimeter
b) derive a formula for the perimeter in the form P=
x + 6 x
a b. P = 2.
s + 4 a.
b. P =
2x x x + x
6x + 12
s s s + 4
3s + 12

4. For each of the following shapes:
a) write an expression for the area, using brackets
b) expand your expressions in part a) by multiplying out the
brackets
c) derive a formula for the area in the form A =
x + 8 2
a b.
c. A = x 3
2 (x + 8)
2x + 16
2x + 16
3 (4x)
12x
12x