an isosceles triangle has sides that are 5, 5, 8. find its area and the length of the three altitude

Answer 1

Draw the triangle with the “5” sides up & the “8” length on the bottom. Draw the altitude. You now see that you have a couple of 3-4-5 triangles.

therefore, the altitude is 3. Each triangle has area = (1/2)(3)(4) = 6

so, the total area is 2 x 6= 12.