Question 396254
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Hi
Using Pythagorean theorem:
A  = (1/2)15 * sqrt(15m^2 - (7.5m)^2 = 97.4279 m^2
Using Heron's formula
A = {{{sqrt(s(s-a)(s-b)(s-c))}}}  
Heron's Equation to find the area of a triangle when 3 sides are given 
and s is the semiperimeter of the triangle
In this example: a,b,c = 15m and s = 22.5m
A = {{{sqrt(22.5m(7.5m)^3)}}}= 97.4279m^2