anonymous
  • anonymous
Find the area of the triangle with a = 4 feet, b = 8 feet, and c = 11 feet. Round to the nearest tenth.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Can you use the Heron's Formula?
anonymous
  • anonymous
This is in relevance to the sides of a right triangle and the answer choices are: 12.3 ft2 9.3 ft2 14.3 ft2 13.3 ft2
anonymous
  • anonymous
Oh, a right triangle!

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anonymous
  • anonymous
I'm not sure what that is.
anonymous
  • anonymous
Since 11 is the highest, it must be the hypotenuse. Which means that the other two are the base and height of the right triangle. Now, use the Area of a Triangle Formula. It is Area = Base*Height / 2
anonymous
  • anonymous
See, that's where I got 16 (4/2*8), but that doesn't fit with the answer choices.
anonymous
  • anonymous
Then shouldn't it be 16? Are your options correct? =?
anonymous
  • anonymous
Yeah, I know. But that's the only explanation since it's a right angled triangle.
anonymous
  • anonymous
Yep. I posted exactly what the question said in the title and the answer choices.
anonymous
  • anonymous
Oh. But you did get what I was trying to say, right?
anonymous
  • anonymous
Yeah, but. How would this work with Heron's Formula? (Maybe I've interpreted it wrong; this is a Trig course, so I assumed it would concern Right Triangles, but maybe not?)
anonymous
  • anonymous
We use Heron's formula when we know all the three sides and the triangle isn't a right angled one. It's a very lengthy process, so we refrain from using it with right angled triangles as they can be better solved using the normal Triangle's Area formula.
anonymous
  • anonymous
http://jwilson.coe.uga.edu/emt725/heron/image12.gif
anonymous
  • anonymous
Oh. If it helps, we were learning about the Law of Sines in this lesson. (That confused me all the more.) Nothing was said about Heron's Formula here or in subsequent lessons, so I think we can avoid that?
anonymous
  • anonymous
Yeah, Heron's formula isn't required here if you've been learning Trigonometry.
anonymous
  • anonymous
And the Law of Sines relates to angles/sides, but we're only given sides to work with here. Sigh!
anonymous
  • anonymous
Which angle of Tan is 1/2?
anonymous
  • anonymous
There isn't one. *Sigh* We can't find the angles! Do you guys use a calculator? And even if we find the angles, what use is it?!
anonymous
  • anonymous
We don't use Trigonometry for finding the area. It's only used to find the angles or sides of a right triangle.
anonymous
  • anonymous
We can use calculators, but if I knew how to approach the problem I would've used it. :P
anonymous
  • anonymous
Honestly, I'm not sure. Thank you for your effort, though. I'm probably just going to guess and hope it doesn't account for much of my grade.
anonymous
  • anonymous
Hehe, we couldn't use calculators. T_T And I wish I remembered how Trigonometry. It was way back in the 9th grade I think. But really, are you sure the question isn't faulty?
anonymous
  • anonymous
On my part, I'm sure it isn't faulty. On the teacher's fault, I'm not sure. I'll ask him about it tomorrow.
anonymous
  • anonymous
Ah, alright. Good luck with that. =D On a personal note, which grade are you in?
anonymous
  • anonymous
10th. Pre-Calculus.
anonymous
  • anonymous
Ha. Okay. =]

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