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I'll be happy to help you, but in order for me to compare the areas of those triangles, you have to tell me the areas of those triangles.
Yes
Divide the polygon into triangles. Calculate the areas of the triangles and then sum these.
Only if the two triangles are congruent will they have equal areas. A third fact is required to determine they are congruent (and thus have the same area): 1) The third sides are equal; 2) The angles enclosed between the sides are equal; or 3) The same one of the sides is the hypotenuse of the triangles, which are right angled triangles.
Yes.
Circles and triangles are both geometric shapes, and their areas can be found using certain formulas.
I'll be happy to help you, but in order for me to compare the areas of those triangles, you have to tell me the areas of those triangles.
yes
In general, you divide up the polygon into triangles, calculate the areas of the triangles and then sum these.
by checking the edges
In most cases, no.
Yes
Divide the polygon into triangles. Calculate the areas of the triangles and then sum these.
Only if the two triangles are congruent will they have equal areas. A third fact is required to determine they are congruent (and thus have the same area): 1) The third sides are equal; 2) The angles enclosed between the sides are equal; or 3) The same one of the sides is the hypotenuse of the triangles, which are right angled triangles.
The only general way is to divide the pentagon into three triangles, calculate the areas of the triangles and add them together.
Yes.
The easiest method is to split the octagon up into triangles and sum the areas of the triangles.