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aNY

  • 3 years ago

plzzzz help me just one question A=72 ft2 B=74 ft2 C=86 ft2 D=32 ft2 Find the area of the figure.

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  1. aNY
    • 3 years ago
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  2. whpalmer4
    • 3 years ago
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    Decompose that into a rectangle and a right triangle by extending the 6 ft line down to the base. Find the area of both of those figures and add them.

  3. aNY
    • 3 years ago
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    HMM

  4. whpalmer4
    • 3 years ago
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    Can you find the base and the height of that triangle? The area will be 1/2 * base * height.

  5. aNY
    • 3 years ago
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    still don'y get it.

  6. aNY
    • 3 years ago
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    you there

  7. aNY
    • 3 years ago
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    anyone that can help

  8. zepdrix
    • 3 years ago
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    |dw:1359845754154:dw|Understand how we're starting this? Breaking it up into 2 easier shapes :)

  9. aNY
    • 3 years ago
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    yes

  10. zepdrix
    • 3 years ago
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    |dw:1359845881864:dw|

  11. zepdrix
    • 3 years ago
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    |dw:1359845947895:dw|

  12. zepdrix
    • 3 years ago
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    See how the dimensions of the triangle come about? :)

  13. aNY
    • 3 years ago
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    yaa

  14. zepdrix
    • 3 years ago
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    |dw:1359846112405:dw|So we want to find the area of these two objects separately. Then we'll add those area's together to get the `total area` of the figure.

  15. aNY
    • 3 years ago
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    ok so i got C

  16. zepdrix
    • 3 years ago
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    Hmm did you forget the formula for area of a triangle maybe? :o

  17. zepdrix
    • 3 years ago
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    cuz C is too big :c

  18. aNY
    • 3 years ago
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    idk what the answer is then

  19. aNY
    • 3 years ago
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    lol :)

  20. zepdrix
    • 3 years ago
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    well it feels like you're just guessing :) lol

  21. aNY
    • 3 years ago
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    i multiplide 10 and 7 i got 70 then i multiplide 4 and 2 then i got 16 then i add them together which i got 86

  22. zepdrix
    • 3 years ago
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    The 70 looks good. \(4 \times 2 \ne 16\) , might wanna visit Mr Calculator for that one! :O And then remember, The area of a triangle we take `half` of the base times height.

  23. aNY
    • 3 years ago
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    woops i ment 8

  24. zepdrix
    • 3 years ago
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    Cool c: Just remember for a triangle,\[\large A=\frac{1}{2}b\cdot h\]

  25. zepdrix
    • 3 years ago
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    So we only want half of that 8 c:

  26. aNY
    • 3 years ago
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    hmm

  27. zepdrix
    • 3 years ago
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    |dw:1359846808816:dw|If we had a square like this, the area would be 8, because 4 x 2 = 8.

  28. zepdrix
    • 3 years ago
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    |dw:1359846855993:dw|But we have a triangle, which is half of that area.

  29. zepdrix
    • 3 years ago
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    still confused? <:o

  30. aNY
    • 3 years ago
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    yes

  31. zepdrix
    • 3 years ago
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    aw :c

  32. aNY
    • 3 years ago
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    ya sorry i'm not that smart

  33. aNY
    • 3 years ago
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    was 74

  34. zepdrix
    • 3 years ago
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    im sure that's not true c: math isn't for everyone!

  35. zepdrix
    • 3 years ago
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    ya 74 D:

  36. aNY
    • 3 years ago
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    so is 74 right

  37. aNY
    • 3 years ago
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    @zepdrix

  38. zepdrix
    • 3 years ago
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    yes c:

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