1. Hint: What type of polygon is the bathroom?
Bell Work
The 3 in the diagram represents 30 ft in real life.
Hint: What type of polygon is the bathroom?
What is the scale for this blueprint
What is the ACTUAL area of the bedroom
3 in
Bathroom
1.5 in
2 in
Bedroom

2. Area & Circumference Objective: TLW
a) Apply the given formula to find the area of a circle, the circumference of a circle, or the volume of a rectangular solid.

3. Radius & Diameter Radius (r): the line HALFWAY through the circle
Radius & Diameter
Radius (r): the line HALFWAY through the circle
Diameter (d): the line splitting the circle in half
radius
diameter

4. Diameter vs Radius True or false
Question 1: The Diameter is half of the
radius? T or F
Question 2: If the diameter of a circle is
30 cm. The radius is 15 cm.

5. Radius & Diameter 6 ¼ cm 5 ft. 3.2 m r =_____ d= ____ r =_____ d= ____
2 ¼ in
6 ¼ cm
r =_____
d= ____
r =_____
d= ____

6. AREA diameter CIRCUMFERENCE (C) : the measurement AROUND the circle.
CIRCUMFERENCE (C) : the measurement AROUND the circle.
C = 2πr C i r c u m f e n
diameter
AREA (A): the measurement INSIDE the circle.
A = π r²
AREA
radius

7. Area & Circumference 9 ¾ cm 6.5 m 18 ft. r =____ d =_____ C= ____
4 ½ in
9 ¾ cm
r =____
d =_____
C= ____
A= ____
r =____
d =_____
C= ____
A= ____

8. Area & Circumference r =____ d = 5cm C= ____ A= ____ r =____
d =_4.2ft__
C= ____
A= ____
r =_6.8in___
d =_____
C= ____
A= ____
r =_10m___
d =_____
C= ____
A= ____

9. Area & Circumference AREA diameter radius Around a circle
Inside a circle
Line halfway through a circle
Line to the end of the circle C i r c u m f e n
diameter