An isosceles triangle has sides that are #sqrt125#, #sqrt125#, and 10 units. What is its area?
the area of a triangle is found through
Imagine that an altitude is drawn down the center of the triangle, perpendicularly bisecting the base and bisecting the vertex angle. This creates two congruent right triangles inside the original isosceles triangle.
You know each of these triangles has a hypotenuse of
We can use the Pythagorean theorem to figure out the length of the missing side, which is the height of the triangle.
So, we now know that the base is