Triangles Definition and 215 Threads

Yikes! I've need help with two questions that seem to involve hard and tedious trig: 1. How do I prove that an equilateral triangle can be inscribed in an epitrochoid? 2. How do I find the coordinates of a centroid of an equilateral triangle (given the x- and y- coordinates of its three...

OK, I've got this question to do: Find complex numbers representing the vertices of a triangle ABC given that the midpoints of the sides BC, CA, AB are represented by complex numbers z_1, z_2, z_3 respectively. Thing is, I don't know where I'm taking the origin to be; if I took it at A...

Use Lagrange Multipliers to prove that the triangle with the maximum area that has a given perimeter p is equilateral. [Hint: Use Heron’s formula for the area of a triangle: A = sqrt[s(s - x)(s - y)(s - z)] where s = p/2 and x, y, and z are the lengths of the sides.] I have no idea how to do...

The question is in the attached picture. i can't seem to find a relevant formula and when i do i can't get a suitable answer, if some one can help, i'll highly appreciate it. Thanks in advance.

Word Problem The leaning tower of pisa leans toward the south at an angle of 5.5 degrees. One day a shadow was 90 m long and the elevation from the tip of the shadow to the top of the tower was 32 degrees 1)Determine the slant height of the tower. First I found all the angles and then...

If sin theta = \frac {-4} {7} and \frac {3 pi} {2} < theta < 2 pi then determine the exact value of \frac {1} {cot (theta)} I don't know where to start I know to set up a circle with a cartesian plane but what am I supposed to do? :rolleyes:

I don't have the answers in the back of my book and I really want to know if i did this correctly since its graded. the Problem is: Let the region bounded by x^2+y^2=9 be the base of a solid. Find the Volume if cross sections taken perpendicular to the base are isosceles right triangles. i...

I was wondering if you can find the sides of a right triangle if you only know the angles of the triangle...i couldn't think of a trig ID or any law..if there is, id like to know it, thanks.

help me please

ok, I'm in first year coolege and we're doing some review from high school work.. but i can't for the life of me remember how to do one of these questions and i can't seem to get past this one part or at least figure out how to prove that it is what i think it is. it's going to be a bit...

If a line in a triangle is a median, does it cut the triangle into two congruent triangles?

Sorry to bother you guys.. but if there is someone out there that is good at math and wouldn't mind helping me.. could you aim me sn:"euphoriet" thanks.

Please move this post if necessary as I was not sure which forum it would be best suited to. Reference: http://space.com/businesstechnology...gle_040902.html http://www.msnbc.msn.com/id/5897539/ Assuming these sightings are not mass hallucinations and that a craft of unknown...

A synopsis of recent events - 1990 through 2004. Included is a summary of archieved data. I'm still not quite sure about the flying triangle reports. I am convinced that these are real craft that are often seen as reported, but some good reports such as those from the Illinois police - who...

I found a neat problem on the web you can look at it http://physics.harvard.edu/undergrad/prob14.pdf I've always had fun with these find the angle problems but my solutions on this one seemed a little bit weird. Anyone want to let me know what they got? Heres what I found angle BCA = 20 and...