2. Do Now

3. 5/5/2015 10-2 D Volume of Cones

4. Key Concept

5. Example 1 Find the volume of the cone. Use 3.14 for . Round to the nearest tenth. V ≈ 301.4 The volume is about 301.4 cubic centimeters.

6. Example 2 A water cooler in the school office dispenses cone- shaped paper cups. The height of a cup is 3 inches, and it has a diameter of 2 inches. What is the volume of the paper cup? Round to the nearest tenth. Since the diameter is 2 inches, use 1 inch for the radius.

7. The volume is about 3.1 cubic inches. V ≈ 3.1 Multiply.

8. Example 3 Find the volume of a cone with a radius r=1 m and height h=1 m Volume of a Cone = (1/3)  r 2 h = (1/3)(3.14)(1) 2 (2) = 2.09 m 3

9. Ex.4: Find the volume of the following right cone w/ a diameter of 6in. 11in V = ⅓Bh = (⅓)  r 2 h = (⅓)  (3) 2 (11) = (⅓)99  = 33  = 103.7in 3 Circle 3in

11. Homework Pg. 614 #1 – 22 Evens Study for quiz!