Download presentation

1
**5th Grade Miss Cameron’s Class**

CIRCUMFERENCE 5th Grade Miss Cameron’s Class

2
**The circumference of a circle is**

The distance around a circle Hint: Circumference remember circle around. Circumference is a circle’s perimeter.

3
**The diameter is the distance across a circle through the center.**

4
**Hint: It is ½ the diameter**

Vocabulary. The radius is the distance from the center of a circle to any point on a circle. Hint: It is ½ the diameter

5
**We use Pi as the measurement to help us find the circumference of a circle.**

Pi, not Pie!

7
**Two formulas are used in finding the circumference of a circle.**

WHEN THE CIRCLE HAS A DIAMETER MEASUREMENT, USE THE FOLLOWING FORMULA. Circumference = d 4in. 3.14 x 4in. 12.6in.

8
**HINT: You may round to the nearest tenth**

When the radius of a circle is given, the following formula should be used. Circumference = 2r 2 x 5cm x 3.14 31.4cm HINT: You may round to the nearest tenth

9
**Tell me what formula would be used to solve the next five problems.**

NOW…Let’s have some fun. Tell me what formula would be used to solve the next five problems.

10
3in C = 2 x r x 3.14

11
8ft C = 3.14 d

12
122mm C = 2 x r x 3.14

13
17.5 cm C = 3.14 x d

14
122.5mm C = 2 x r x 3.14

15
**Now that we have determined the correct formula for each, let’s work the problems.**

16
The answer is: 18.8in 3in C = 2 x 3.14 x r

17
8ft C = 3.14 d The answer is: 25.1ft

18
122mm C = 2 x 3.14 x d The answer is: mm

19
17.5 cm C = 3.14 x d The answer is: 55cm

20
122.5mm C = 2 x 3.14 x r The answer is: 76,930mm

21
**The amount of space inside.**

Area of a circle= The amount of space inside. r ² 6 m

22
Another formula ½ d x 12 ft

23
Find area 9 ft

24
Find area 15 mm

25
Find area 13 cm

26
Find area 19 ft

27
**Circles rap Circles, those tricky circles! Pow! I said those circles.**

By Miss Cameron Circles, those tricky circles! Pow! I said those circles. Those tricky circles! Pow!

28
**Circumference is perimeter; it’s all the same**

They just try to trick you with a name game. Circumference is diameter, the length across Multiplied by pi So don’t get lost

29
**Rap with me now, & please don’t slumber. **

Pi is 3.14, a funny number. Rap with me now, & please don’t slumber. Area for a circle is radius squared. So half the diameter and make it squared.

30
**Well you know what to do, so do it now. **

Find circumference and area of a circle. POW! Circles, those tricky circles. POW! I said those circles, those tricky circles. POW!

Similar presentations

Presentation is loading. Please wait....

OK

Perimeter The distance around the outside of a shape.

Perimeter The distance around the outside of a shape.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on thermal power plants in india Ppt on culture of japan Ppt on equity mutual funds Ppt on rf based 8 channel remote control Download ppt on area of parallelogram and triangles Ppt on bluetooth hacking device Ppt on job satisfaction and attitude Ppt on p&g products list Ppt on game theory in economics Ppt on area of triangle