1'7 Introduction to Perimeter, Circumference,

1
1.7 Introduction to Perimeter, Circumference,
Area

• Geometry
• Mrs. Spitz
• Fall 2005

2
Standards/Objectives

• Standard 3 Students will understand geometric
  concepts and applications.
• Objectives
• Find the perimeter and area of common plane
  figures.
• Use a general problem-solving plan.

3
Assignment

• pp. 55-57 1-47 and practice quiz on pg. 58 1-10
  all.
• EXTRA CREDIT I will use this to make up an
  assignment you are missing (some of you are
  missing a few). You must show ALL WORK NO
  MAGICIANS IN ALLOWED, PLEASE.
• Chapter 1 Review pp. 60-62 1-33 all

4
Rectangle
W (width)

• Perimeter
• P2l 2w
• Area
• Alw

l (length)
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Square

• Perimeter
• P4s
• Area
• As2

S (side)
6
Triangle

• Perimeter
• Pabc
• Area
• A ½ bh

a
c
h (height)
b (base)
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Circle

• Diameter
• d2r
• Circumference
• C2pr
• Area
• Apr2

diameter
radius
Always use the p button on the calculator
even when the directions say to use 3.14.
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Example Find the perim. area of the figure.

• P2l 2w
• P2(5in)2(3in)
• P10in6in
• P16in
• Alw
• A(5in)(3in)
• A15in2

5 in
3 in
9
Ex Find the perim. area of the figure.

• P4s
• P4(20m)
• P80m
• As2
• A(20m)2
• A400m2

20 m
10
Ex Find the perim. area of the figure.

• Pabc
• P5ft7ft6ft
• P18 ft
• A ½ bh
• A ½ (7ft)(4ft)
• A ½ (28ft2)
• A 14ft2

5 ft
4 ft
7 ft
6 ft
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Ex Find the circumference area of the circle.

• C2pr
• C2p(5in)
• C10p in
• C31.4 in
• Apr2
• Ap(5in)2
• A25p in2
• A78.5 in2

10in
12
Reminders

• Test after this section.
• Start doing your definitions for chapter 2 Do
  all of them including the review.
• Start doing your postulates/theorems (green
  boxes) pp. 73, 88, 89, 90, 96, 98, 102, 109,
  110, 111, 112,