The bottom of a planter is to be made in the shape of an isosceles triangle, with the two equal sides 3 ft long and the third side 2 ft long. The area of an isosceles triangle with two equal sides of length a and third side of length b is

(a) Find the area of the bottom of the planter.
(b) The manufacturer is considering changing the shape so that the third side is 2.5 ft long. What would be the approximate effect on the area?

Transcribed Image Text:

f(a, b) 1 ==bV4a²-b².