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anonymous

  • 4 years ago

how do you find out if a triangle with the side measurements of 84,13, & 85 is obtuse, acute, or right using the formula a2+b2=c2 (the twos are exponents)

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  1. phi
    • 4 years ago
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    |dw:1327860446423:dw| a^2+b^2 = c^2 only true if it is a right triangle

  2. phi
    • 4 years ago
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    |dw:1327860656664:dw|

  3. phi
    • 4 years ago
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    so get out your calculator and see what 84*84 + 13*13 is

  4. phi
    • 4 years ago
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    and then 85*85

  5. anonymous
    • 4 years ago
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    i don't know what those little signs between the number means

  6. phi
    • 4 years ago
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    a^2 means a to the second power (or a squared, or a times a (a*a)

  7. anonymous
    • 4 years ago
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    oh okay when we do it we just do it a2. okay then hold on a sec

  8. anonymous
    • 4 years ago
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    r u wanting me to do 84x84?

  9. phi
    • 4 years ago
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    a2 is really not a good way to write it, because it really means a times 2 enough people do it here that I can guess what you mean, but it would be better to use the up-arrow.

  10. anonymous
    • 4 years ago
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    okay i did it so it's a right triangle

  11. phi
    • 4 years ago
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    the formula a^2 + b^2 = c^2 means take the two shortest legs, square them, and add together. Compare this to the square of the longest leg. Your calculator probably has a square button, but 84*84 gives the same answer

  12. anonymous
    • 4 years ago
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    7225=7225

  13. phi
    • 4 years ago
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    yes, looks good.

  14. anonymous
    • 4 years ago
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    what would the equation be for an acute triangle

  15. anonymous
    • 4 years ago
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    nvrmnd i figured it out

  16. phi
    • 4 years ago
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    |dw:1327861182819:dw| if c*c is too small then it is acute

  17. anonymous
    • 4 years ago
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    ok thanks

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