Question 252421: Show that the points (4,5),(1,1) and (-2,5) are the vertices of an isosceles triangle. Find the area.
Answer by MRperkins(300)   (Show Source):
You can put this solution on YOUR website! Use the distance formula to show that two lengths of the triangle are congruent. Then, by definition, the triangle is isosceles. The area formula for a triangle is 
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