math help

[KaNaDiAnIcEmAn]

2 sides of triangle are 5

base is 3


the height in back o fbook is 4, how do i get this.

[bejohnson]

Is there a picture of the triangle?

[KaNaDiAnIcEmAn]

helping friend over cam lol

[mrman_3k]

Originally posted by bejohnson
Is there a picture of the triangle?

No picture is needed, it would be an isoceles triangle. So let me get this straight, the base is 3, and the other two sides are length 5?

Just thinking about this in my head, I don't think the height could be 4. Using the Windows calculator I get the height as 4.770. I think there is a mistake in the answer key.

[bejohnson]

I ask because if the base is 3 with two sides equal to 5 then to solve for height you bisect the triangle. This would give two triangles with a hypotenuse of 5 and a base of 1.5 which gives a height of 4.7695 not 4. Now if the base of each triangle formed by the bisection is 3 and the hypotenuse is 5 the height will be 4. This would mean that the original base was 6.

[bejohnson]

Originally posted by mrman_3k
No picture is needed, it would be an isoceles triangle. So let me get this straight, the base is 3, and the other two sides are length 5?

Just thinking about this in my head, I don't think the height could be 4. Using the Windows calculator I get the height as 4.770. I think there is a mistake in the answer key.

That's why I asked if there was a picture. See my last post.

[Ringthane]

If he's got the answer key, why does he need help?

[eire1274]

Simple way is to divide the triangle into two identical isosceles triangles (that is, of course, a triangle with one corner being a right angle). See the pic below.

Now, take one triangle and solve using the Pythagorean Theorem: A²+B²= C² where A and B are the sides adjoining the right angle.

So, therefore, A²+1.5²=5²

Solve for A:

Isolate A by subtracting 1.5² from both sides:
A²=5²-1.5²

Solve squares:
A²=25-2.25

Total numbers:
A²=22.75

Solve A² by taking Square Root (SQR) of both sides:
A=SQR(22.75)

Solve for Square Root:
A=4.7696960070847282457631079301161

There ya go!

[eire1274]

Geez... I took too long doing my answer.

Ringthane: even if he has the answer, he is being asked to show the work to arrive at the answer.

[Ringthane]

Originally posted by eire1274
Geez... I took too long doing my answer.

Ringthane: even if he has the answer, he is being asked to show the work to arrive at the answer.

So let him figure it out.

Back when I was in school, I didn't have any nice people over the internet to do my homework for me.

[eire1274]

Originally posted by Ringthane
So let him figure it out.
Sure. I'm just telling KaNaDiAnIcEmAn how to do it. :Wink

[KaNaDiAnIcEmAn]

ha its not for me its for a friend!!!!
i swear

im doing matrices right now

[mrman_3k]

Looks like we all answered at about the same time:rofl2

So what math level is everyone in here?

[KaNaDiAnIcEmAn]

30ap :D

i dont have the attention span nor desire to do homework

[blpeterson]

Originally posted by mrman_3k
Looks like we all answered at about the same time:rofl2

So what math level is everyone in here?

Ed is college level math. I'm love to relax with differential calculus, quantum mechanics and physics and advanced statistics.

[Sky Rookie]

Originally posted by blpeterson
Ed is college level math. I'm love to relax with differential calculus, quantum mechanics and physics and advanced statistics.

Ok, I finshed all these already... want to help me with my Abstract Algebra?

I'm taking in a summer class, so normally a 16 week class condensed into 10 weeks! This is a hard core class, it's kicking my but.

[bejohnson]

Originally posted by Sky Rookie
Ok, I finshed all these already... want to help me with my Abstract Algebra?

I'm taking in a summer class, so normally a 16 week class condensed into 10 weeks! This is a hard core class, it's kicking my but.

Go to this Website. (http://www.math.niu.edu/~beachy/aaol/frames_index.html) I find it useful for reference.

[Sky Rookie]

Originally posted by mrman_3k
So what math level is everyone in here?

I'm one semester and this summer away from graduating with a BS in Mathematics with a minor in secondary education. I've also completed course work to get an endorcement in physical science and earth science.

I look forward to going to grad school in the fall of 2005 to get a MS in Mathematics Education.


Good Luck to everyone in their math courses.

[Sky Rookie]

Originally posted by bejohnson
Go to this Website. (http://www.math.niu.edu/~beachy/aaol/frames_index.html) I find it useful for reference.

Thanks... that's funny I'm considering NIU for grad school since it's only 45 mins away.

[Arkan]

This is all the math classes that I have had on college <B.S. in Computer Science>

Intermediate Algebra
College Algebra
Planar Trigonmetry
Calculus 1
Calculus 2
Calculus 3
Discrete Math
Linear Algebra
Advance Discrete Math/aka Combinatorics
Finite Math
Probability
Statistical Methods

I think that is every one

[getit29]

Originally posted by mrman_3k
So what math level is everyone in here?
hehehe back when I went to school 1+1= 2 unless it was a man
and woman then 1+1=2 or 3 or 4 or more like when someone says
pie r square I just tell them they are wrong it is *pie r round and
cornbread r square*. lol!!!:lmao :lmao :rofl2 :rofl2

[mrman_3k]

Neat to see, I will be starting multi-variable calc when I return to school next year. Currently finishing the 4th level calc or Calc 1D depending on how your school names the classes.

BTW anyone else go to Berkeley?

[eire1274]

Not going to get into my math history.

Lets just say that I read A Brief History of Time by Stephen Hawking and found it fascinating but simplistic in it's approach.

I'm cursed with a high learning desire and a short attention span. I learn everything I can, but yet get bored trying to apply it! Hence bouncing from job to contract to job in the IT and retail world, and now starting a car modifications company.

[Artcwolf]

Originally posted by eire1274
I'm cursed with a high learning desire and a short attention span. I learn everything I can, but yet get bored trying to apply it! Hence bouncing from job to contract to job in the IT and retail world, and now starting a car modifications company.

Glad I'm not the only one...