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Danny_Boy

  • one year ago

What is the area of ABC below? If necessary, round your answer to two decimal places.

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  1. Danny_Boy
    • one year ago
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  2. Danny_Boy
    • one year ago
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    i got the area form each triangle sepreatly then added them up and got 128.77

  3. Preetha
    • one year ago
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    That should be right. You have two sides, you can calculate the third.

  4. slopez95
    • one year ago
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    i'll check your answer and see if it's right. Give me a second :)

  5. Danny_Boy
    • one year ago
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    thank you :)

  6. Danny_Boy
    • one year ago
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    37.13

  7. Danny_Boy
    • one year ago
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    @slopez95

  8. slopez95
    • one year ago
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    you got that for the bigger one? because I got 21.81. hmm how did you get that?

  9. Danny_Boy
    • one year ago
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    i multiply 7.9 and 23.2 for the big one then divide by 2 same for the small one 9.4x7.9 then divide by 2

  10. slopez95
    • one year ago
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    hmm that might be why. i used a^2+b^2=c^2 to get the base of both triangles first. to get the area you do bh/2. base is the bottom measurement.

  11. Danny_Boy
    • one year ago
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    well i have to find the area so i found he area of both then add them together i think thats how?

  12. slopez95
    • one year ago
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    yes but you're finding the area the wrong way. first you have to find the base. without the base measurement you can't find area. once you do it that way, you can add them

  13. Danny_Boy
    • one year ago
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    poo so how can i find the base? can you help me plz :)

  14. slopez95
    • one year ago
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    okayy. a triangle is sides a, b and c. now the slanted side is always c. For the smaller one the sides are b=7.9 and c=9.4. plug it into this and solve. a^2+b^2=c^2 let me know what you get.

  15. Danny_Boy
    • one year ago
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    so it would be 62.41 and 88.36 then subtract = 25.9 right?

  16. slopez95
    • one year ago
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    yes! now find the square root since that is squared right now.

  17. Danny_Boy
    • one year ago
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    5.09?

  18. slopez95
    • one year ago
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    exactly :) now do the same for the bigger triangle.

  19. Danny_Boy
    • one year ago
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    i got square root of 21.81?

  20. Danny_Boy
    • one year ago
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    26.9?

  21. slopez95
    • one year ago
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    oh wait, no i'm sorry. now with each of the bases you do bh/2 to get the area. my bad. So it'll be 5.09*7.9 and 21.81*7.9

  22. Danny_Boy
    • one year ago
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    hahaha lol its cool =)

  23. Danny_Boy
    • one year ago
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    i got 40.211 and 172.299?

  24. slopez95
    • one year ago
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    yes :) now add lol

  25. Danny_Boy
    • one year ago
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    212.51?

  26. slopez95
    • one year ago
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    you got it :)

  27. Danny_Boy
    • one year ago
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    thank you ur awesome

  28. slopez95
    • one year ago
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    No problem :) thanks.

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