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Estimate Perimeter, Circumference, and Area

Estimate Perimeter, Circumference, and Area. When estimating perimeter of shapes on a grid, use the length of one grid square to approximate the length of each side of the figure. Estimate Perimeter, Circumference, and Area.

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Estimate Perimeter, Circumference, and Area

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  1. Estimate Perimeter, Circumference, and Area When estimating perimeter of shapes on a grid, use the length of one grid square to approximate the length of each side of the figure.

  2. Estimate Perimeter, Circumference, and Area When estimating perimeter of shapes on a grid, use the length of one grid square to approximate the length of each side of the figure. Also use things like Pythagorean theorem to help find diagonal lengths. Or circumference when a circle or part of a circle is in the figure.

  3. Estimate Perimeter, Circumference, and Area Let’s estimate the perimeter of this figure…

  4. Estimate Perimeter, Circumference, and Area Let’s estimate the perimeter of this figure… We can easily count the bottom of the shape…

  5. Estimate Perimeter, Circumference, and Area Let’s estimate the perimeter of this figure… We can easily count the bottom of the shape…

  6. Estimate Perimeter, Circumference, and Area Let’s estimate the perimeter of this figure… Now use Pythagorean theorem to calculate the diagonal…

  7. Estimate Perimeter, Circumference, and Area Let’s estimate the perimeter of this figure… Now use Pythagorean theorem to calculate the diagonal…

  8. Estimate Perimeter, Circumference, and Area

  9. Estimate Perimeter, Circumference, and Area Let’s estimate the perimeter of this figure… Now use the circumference formula…diameter = 5 cm

  10. Estimate Perimeter, Circumference, and Area It’s ½ of a circle

  11. Estimate Perimeter, Circumference, and Area It’s ½ of a circle

  12. Estimate Perimeter, Circumference, and Area It’s ½ of a circle

  13. Estimate Perimeter, Circumference, and Area When estimating area, the same strategies can be utilized…

  14. Estimate Perimeter, Circumference, and Area When estimating area, the same strategies can be utilized… We have a triangle and half of a circle…

  15. Estimate Perimeter, Circumference, and Area

  16. Estimate Perimeter, Circumference, and Area Here is a triangle with a base of 5 and a height of 5.

  17. Estimate Perimeter, Circumference, and Area

  18. Estimate Perimeter, Circumference, and Area

  19. Estimate Perimeter, Circumference, and Area

  20. Estimate Perimeter, Circumference, and Area In some problems, a grid will not be given. Just dimensions of what the figure is contained inside.

  21. Estimate Perimeter, Circumference, and Area In some problems, a grid will not be given. Just dimensions of what the figure is contained inside. Find the perimeter of the shape…

  22. Estimate Perimeter, Circumference, and Area It looks like the corners of the figure sit at the midpoint of the sides of the container… So half of 12 ft is 6 ft

  23. Estimate Perimeter, Circumference, and Area It looks like the corners of the figure sit at the midpoint of the sides of the container… We can use Pythagorean theorem to find the three straight edges…

  24. Estimate Perimeter, Circumference, and Area It looks like the corners of the figure sit at the midpoint of the sides of the container… We can use Pythagorean theorem to find the three straight edges…

  25. Estimate Perimeter, Circumference, and Area It looks like the corners of the figure sit at the midpoint of the sides of the container… We can use Pythagorean theorem to find the three straight edges… The curved edge is ¼ of a circle with diameter of 12 ft…

  26. Estimate Perimeter, Circumference, and Area It looks like the corners of the figure sit at the midpoint of the sides of the container… We can use Pythagorean theorem to find the three straight edges… The curved edge is ¼ of a circle with diameter of 12 ft…

  27. Estimate Perimeter, Circumference, and Area It looks like the corners of the figure sit at the midpoint of the sides of the container… We can use Pythagorean theorem to find the three straight edges… The curved edge is ¼ of a circle with diameter of 12 ft…

  28. Estimate Perimeter, Circumference, and Area It looks like the corners of the figure sit at the midpoint of the sides of the container… We can use Pythagorean theorem to find the three straight edges… The curved edge is ¼ of a circle with diameter of 12 ft…

  29. Estimate Perimeter, Circumference, and Area

  30. Estimate Perimeter, Circumference, and Area When estimating the area of odd shapes on a grid, estimate the area filled in for each individual square…then add the amounts

  31. Estimate Perimeter, Circumference, and Area Estimate the area of the given shape…

  32. Estimate Perimeter, Circumference, and Area 8 full squares = 8 Estimate the area of the given shape… You can see that there are 8 squares that are completely filled…

  33. Estimate Perimeter, Circumference, and Area 8 full squares = 8 8 half squares = 4 Estimate the area of the given shape… You can see that there are 8 squares that are completely filled… There are 8 places that are about ½ filled…

  34. Estimate Perimeter, Circumference, and Area 8 full squares = 8 8 half squares = 4 4 quarter squares = 1 Estimate the area of the given shape… You can see that there are 8 squares that are completely filled… There are 8 places that are about ½ filled… There are 4 spots that are about ¼ filled…

  35. Estimate Perimeter, Circumference, and Area 8 full squares = 8 8 half squares = 4 4 quarter squares = 1

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