By Jari and Tom
<ul><li>Why does A=πr 2  work to find the area of a circle. </li></ul>
<ul><li>A circle was cut into 24 equal pieces. </li></ul><ul><li>2. The pieces were stuck onto paper in the shape of a rec...
<ul><li>The challenge was to make proof that the formulas work. </li></ul>
<ul><li>A= l×w </li></ul><ul><li>A =c÷2×r </li></ul><ul><li>A=(π× d) ÷ 2 ×r </li></ul><ul><li>A=(π×2×r)÷2×r </li></ul><ul>...
Upcoming SlideShare
Loading in …5
×

Math Circle Presentation

3,959 views

Published on

Published in: Education, Technology
1 Comment
0 Likes
Statistics
Notes
  • Be the first to like this

No Downloads
Views
Total views
3,959
On SlideShare
0
From Embeds
0
Number of Embeds
17
Actions
Shares
0
Downloads
26
Comments
1
Likes
0
Embeds 0
No embeds

No notes for slide

Math Circle Presentation

  1. 1. By Jari and Tom
  2. 2. <ul><li>Why does A=πr 2 work to find the area of a circle. </li></ul>
  3. 3. <ul><li>A circle was cut into 24 equal pieces. </li></ul><ul><li>2. The pieces were stuck onto paper in the shape of a rectangle. </li></ul><ul><li>3. Questions of area were answered. </li></ul><ul><li>4. Then we had to prove why A=l×w = A=πr 2 </li></ul>
  4. 4. <ul><li>The challenge was to make proof that the formulas work. </li></ul>
  5. 5. <ul><li>A= l×w </li></ul><ul><li>A =c÷2×r </li></ul><ul><li>A=(π× d) ÷ 2 ×r </li></ul><ul><li>A=(π×2×r)÷2×r </li></ul><ul><li>A=πr 2 </li></ul>

×