1. Hexagon (all sides the same)
Warm Up: Perimeter
*Perimeter is the distance around a polygon
*Find perimeter by adding the length of the sides together*
38 km
67 cm
49 cm
49 cm
57 km
22 cm
22 cm
54 cm
18 cm
P=190 km
P=189 cm
P=152 cm
P=468 m
P=54 cm
P=346 cm
78 m
96 cm
14 cm
77 cm
Hexagon (all sides the same)
Square/Diamond
Parallelogram

2. Lesson 4.2: Area
I can:
Find the area of a circle, triangle, square, and quadrilaterals using their formulas.
Vocabulary:
Area
Base
Height
Altitude

3. Area
The amount of space inside an object. The number of square units it takes to completely fill a space.

4. Area of a Circle
*On Friday, we learned how to find the circumference of a circle, or the part shown in black; today we are learning how to find the area, or the red part.

5. Find the Area
You are given the radius, find the area. 15

6. Find the Area
You are given the diameter, find the area. 4

7. Find the Area 13 6

8. Base
The side of a figure that is perpendicular to the height/altitude.

9. Height
The distance from the top of an object to its base. h b

10. Altitude
Height of an object.

11. Area of a Triangle Think about this: h b
How many triangles are in a rectangle?
What is the area of a rectangle?
What would the area of ONE triangle be?

12. Find the Area 2 7 6
A=7 3 3 8
A=9
A=12

13. Find the Area 2
1. A=4
2. A=9 4 6 3