Homework Help: isosceles triangle

Posted by Jim on Thursday, July 26, 2007 at 9:59am.

An isosceles triangle is a triangle that has two equal sides. Find AB, BC and AC. Determine if the triangle is isoseles or not based on the lengths of the three sides. can someone show me how to solve?please

The triangle is isosceles if AB = BC, or BC = AC, or AB = AC. Without that information on side lengths, I can't tell you if it is or not.

B(1,5),c(5,3),and a(1,1)

Do you know how I can find x if AB = 4x and BC = 2x + 10.

As drwls pointed out, using these 3 points you have to find the lengths of AB, BC, and AC.
if two of them are equal you have an isosceles triangle, if all three are equal the triangle is equilateral

Use your "distance between two points" formula

is AB equal to BC???

if so, then set 4x=2x+10 and solve. Easy!!

otherwise the question makes no sense

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