anonymous
  • anonymous
I need help please! with area of triangles
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
im bad at geometry!
anonymous
  • anonymous
1/2 x Breadth x Height
anonymous
  • anonymous
\[Area_{\Delta} = \frac{1}{2}Base \times Height\]

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More answers

anonymous
  • anonymous
i know. but i need help solving a question.!
anonymous
  • anonymous
im sorry its base.
anonymous
  • anonymous
post your question here!
anonymous
  • anonymous
Breadth is a decent word for it
anonymous
  • anonymous
ok hold on.
anonymous
  • anonymous
use 1.7 as the value of square root 3. what is the area of equalateral triangle abc in sq. in
anonymous
  • anonymous
what are the lengths of the sides of the triangle?
anonymous
  • anonymous
here ill send a picture.
anonymous
  • anonymous
anonymous
  • anonymous
Ok, so what is the length of the base?
anonymous
  • anonymous
I don't know..
anonymous
  • anonymous
its equilateral
anonymous
  • anonymous
4?
anonymous
  • anonymous
yes
anonymous
  • anonymous
Ok.
anonymous
  • anonymous
so now we need the height (the length of the blue line through the middle)
anonymous
  • anonymous
how?
anonymous
  • anonymous
pythagoras theorem
anonymous
  • anonymous
Well, we have 2 right triangles described in the middle of that equalateral triangle.
anonymous
  • anonymous
yes.
anonymous
  • anonymous
\[2^{2} + x ^{2} = 4^{?}\]
anonymous
  • anonymous
so the length of the hypotenuse of either of them is 4. and one leg is 2 (half of 4). What is the length of the other leg?
anonymous
  • anonymous
its 2?
anonymous
  • anonymous
\[x = \sqrt{4^{2}-2^{?}}\]
anonymous
  • anonymous
which is sqrt of (16 - 4)
anonymous
  • anonymous
which is sqrt 12.
anonymous
  • anonymous
since sqrt 3 is given by 1.7
anonymous
  • anonymous
yes,
anonymous
  • anonymous
sqrt 12 = sqrt(4x3)
anonymous
  • anonymous
sqrt(4x3) = 2x(sqrt3)
anonymous
  • anonymous
which is 2x1.7 = 3.4, therefore the length is 3.4 and the base 4.
anonymous
  • anonymous
using the formula 1/2 b h = 0.5 x 3.4 x 4.
anonymous
  • anonymous
the answer is 6.8 inches
anonymous
  • anonymous
are u sure
anonymous
  • anonymous
this means you don't understand how it's done!
anonymous
  • anonymous
the more important question is are YOU sure.
anonymous
  • anonymous
Because if you aren't sure, then you have no way to know if holy did it right.
anonymous
  • anonymous
yes.
anonymous
  • anonymous
NO I UNDERSTAND! :) now.
anonymous
  • anonymous
can u guys help me with one more like that?
anonymous
  • anonymous
?
anonymous
  • anonymous
anonymous
  • anonymous
its the same question as the previous. if you understood you should be able to do this.
anonymous
  • anonymous
since its an equilateral triangle. use the formula to get the length of the triangle.
anonymous
  • anonymous
using the formula \[a ^{2} + b ^{2} = c ^{2}\]
anonymous
  • anonymous
you can find out what is the height/length of the triangle.

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