aNY 2 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

2. whpalmer4

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

HMM

4. whpalmer4

Can you find the base and the height of that triangle? The area will be 1/2 * base * height.

5. aNY

still don'y get it.

6. aNY

you there

7. aNY

anyone that can help

8. zepdrix

|dw:1359845754154:dw|Understand how we're starting this? Breaking it up into 2 easier shapes :)

9. aNY

yes

10. zepdrix

|dw:1359845881864:dw|

11. zepdrix

|dw:1359845947895:dw|

12. zepdrix

See how the dimensions of the triangle come about? :)

13. aNY

yaa

14. zepdrix

|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

ok so i got C

16. zepdrix

Hmm did you forget the formula for area of a triangle maybe? :o

17. zepdrix

cuz C is too big :c

18. aNY

idk what the answer is then

19. aNY

lol :)

20. zepdrix

well it feels like you're just guessing :) lol

21. aNY

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

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

woops i ment 8

24. zepdrix

Cool c: Just remember for a triangle,$\large A=\frac{1}{2}b\cdot h$

25. zepdrix

So we only want half of that 8 c:

26. aNY

hmm

27. zepdrix

|dw:1359846808816:dw|If we had a square like this, the area would be 8, because 4 x 2 = 8.

28. zepdrix

|dw:1359846855993:dw|But we have a triangle, which is half of that area.

29. zepdrix

still confused? <:o

30. aNY

yes

31. zepdrix

aw :c

32. aNY

ya sorry i'm not that smart

33. aNY

was 74

34. zepdrix

im sure that's not true c: math isn't for everyone!

35. zepdrix

ya 74 D:

36. aNY

so is 74 right

37. aNY

@zepdrix

38. zepdrix

yes c: