Finding the volume of a cone.pptx

a lesson about the measurement of surface area of a cone

1. FINDING THE VOLUME OF A CONE

2. Drill

3. Find the product of the ff. 1.1/3 x 8 2.1/3 x 5 3.1/3 x 3.14 x 3 4.1/3 x 22/7 x 6 5.1/3 x 3.14 x 2

4. Review

5. lesson’s objective. F inds the volume of cones M6ME-IVb-97

6. What kinds of things can you think of, in real life, when you hear the word cone?

7. Group Activity

8. 1) Distribute a cone to each group. 2) Let them measure the height and the radius of each cone in cm. 3) Let them solve for the volume of their cone using the formula. 4) Group sharing follows afterwards.

9. 1. Calculate the volume if r = 2 cm and h = 3 cm 2. Calculate the volume if r = 4 cm and h = 2 cm Pair-share:

10. x h   Vcylinder = x h   Vcone = 3

11. FIND THE VOLUME 3 cm 5 cm 2 cm 10 cm 4 cm 7 cm 3 cm 8 cm 5 cm 4 cm 1. 2. 3. 4. 5.

12. FIND THE VOLUME 2 cm 5 cm 4 cm 4 cm 3 cm 7 cm 6 cm 7 cm 5 cm 4 cm 1. 2. 3. 4. 5.

13. Individual practice: 1.Find the volume of a cone, if radius is 4 cm and height is 9 cm. 2. Find the volume of a cone which has the base radius of 8 cm and height 10.24cm

14. Solution: 1. Radius r= 4 cm Height h= 9 cm Using the volume of a cone formula, Volume of cone =  Volume of cone = 1/3 x 3.14 x 4² x 9 = 150.72 cm³ 2.

15. How can you find the volume of a cone ?