Math homework help?

Question

i need a website or can u explain how to find the area of ireegular shapes and triangles!!!!!!!!please help ASAP

Answer 1

use the following website www.gomath.com

Answer 2

With the extension of tilted labels it becomes very a difficult problem. The easiest thing would still be to create a rasterized picture and have a rectangular label. If you don't want to do that, then your best bet might be to first triangulate the shape, then try to fit in the label the label on the triangles somehow. I don't really know any specific algorithm for it. Things that popped into mind that you might want to try after triangulation are:
1) for each triangle put the label to the center of the triangle at the angle that the triangles outer side is (ie the side that is original vertex in the shape) and find out how much of the label is inside the triangles, then choose the triangle where the label is most inside this triangle and other triangles it intersects.
or
2) for each two triangles draw a straight between centers of two triangles and put the label on the straight at half way between the two triangles, then again choose the label that is best inside the triangles.

It might give quite nice outcome, if the lakes are simple polygons that do not have very jagged edges.

The easiest algorithm for triangulation is probably ear cutting:
http://cgm.cs.mcgill.ca/~godfried/teaching/cg-projects/97/Ian/cutting_ears.html

: No, I meant a single entity, for example, a irregular shaped polygon with 50 vertices in vector graphics. I was given a project to find the best/optimal point for its label placement. If the shape is a circle, rectangle, or equal sided polygon, the best position for its label is the mid point. For irregular shape, which is the best??? Better yet, the angle (tilted upward/downward) of the label can somewhat follow the shape. I think the algorithm (if found) can be used with regular/irregular shape!

Answer 3

http://www.mathgoodies.com/lessons/vol1/area_triangle.html

try here for triangles- seems pretty concise and even offers a quiz to make sure you're doing it right.

not sure what other irregular shapes you are referring to....they all have their own formulas pretty much....

Answer 4

http://math.about.com/library/blmeasurement.htm

Answer 5

Try this one: http://www.321know.com/geo78_x6.htm