Chapter 11, Lesson 6


11-6.A round numbers
Round 2π(6.72) to the nearest hundredth.
a.
Use π = 3.14.
b. Use π from a calculator.

11-6.B rename units of measure
Express in square inches: 3 square feet

11-6.C use the surface area formulas for prisms and cylinders
Find the surface area of each figure. Answer in terms of π.
a. rectangular prism: length = 4 ft, width = 9 ft, height = 7 ft
b. cylinder: diameter = 12 cm, height = 26 cm