1.7 Intro to P, C, & A

1.7 Intro to P, C, & A - 1.7 Introduction to...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1.7 Introduction to Perimeter, Circumference, & Area Circumference, p. 51 Rectangle Rectangle W (width) • Perimeter P=2l +2w l (le ngth) • Area A=lw Square Square • Perimeter P=4s S (side) • Area A=s2 Triangle Triangle • Perimeter P=a+b+c a h (height) b c • Area A= ½ bh (base) Circle Circle • Diameter d=2r • Circumference C=2πr • Area A=πr2 diameter us di ra ** Always use the π button on the calculator; ** even when the directions say to use 3.14. even Example: Find the perim. & area of the figure. Example: • P=2l +2w P=2(5in)+2(3in) P=10in+6in P=16in 5 in 3 in • A=lw A=(5in)(3in) A=15in2 Ex: Find the perim. & area of the figure. Ex: • P=4s P=4(20m) P=80m 20 m • A=s2 A=(20m)2 A=400m2 Ex: Find the perim. & area of the figure. Ex: • P=a+b+c P=5ft+7ft+6ft P=18 ft 4 ft 5 ft 7 ft 6 ft • A= ½ bh A= ½ (7ft)(4ft) A= ½ (28ft2) A= 14ft2 Ex: Find the circumference & area of the circle. circle. n 0i 1 • C=2πr C=2π(5in) C=10π in C≈31.4 in • A=πr2 A=π(5in)2 A=25π in2 A≈78.5 in2 Assignment Assignment ...
View Full Document

This note was uploaded on 02/12/2011 for the course MTG 3212 taught by Professor Jackson during the Spring '11 term at University of Florida.

Ask a homework question - tutors are online