aNY
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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aNY
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whpalmer4
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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.
aNY
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HMM
whpalmer4
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Can you find the base and the height of that triangle? The area will be 1/2 * base * height.
aNY
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still don'y get it.
aNY
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you there
aNY
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anyone that can help
zepdrix
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|dw:1359845754154:dw|Understand how we're starting this? Breaking it up into 2 easier shapes :)
aNY
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yes
zepdrix
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|dw:1359845881864:dw|
zepdrix
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|dw:1359845947895:dw|
zepdrix
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See how the dimensions of the triangle come about? :)
aNY
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yaa
zepdrix
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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.
aNY
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ok so i got C
zepdrix
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Hmm did you forget the formula for area of a triangle maybe? :o
zepdrix
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cuz C is too big :c
aNY
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idk what the answer is then
aNY
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lol :)
zepdrix
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well it feels like you're just guessing :) lol
aNY
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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
zepdrix
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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.
aNY
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woops i ment 8
zepdrix
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Cool c: Just remember for a triangle,\[\large A=\frac{1}{2}b\cdot h\]
zepdrix
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So we only want half of that 8 c:
aNY
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hmm
zepdrix
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|dw:1359846808816:dw|If we had a square like this, the area would be 8, because 4 x 2 = 8.
zepdrix
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|dw:1359846855993:dw|But we have a triangle, which is half of that area.
zepdrix
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still confused? <:o
aNY
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yes
zepdrix
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aw :c
aNY
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ya sorry i'm not that smart
aNY
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was 74
zepdrix
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im sure that's not true c: math isn't for everyone!
zepdrix
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ya 74 D:
aNY
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so is 74 right
aNY
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@zepdrix
zepdrix
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yes c: