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September 21, 2014

September 21, 2014

Posted by **ben** on Tuesday, September 18, 2012 at 2:54am.

length of its base b (assume that the other two sides are the sides of equal length). What is the domain

of A?

- Math -
**Reiny**, Tuesday, September 18, 2012 at 8:38amlet each of the equal sides be x

so 2x + b = 10

x = (10-b)/2

let the height be h

h^2 + (b/2)^2 = [(10-b)/2]^2

h^2 + b^2/4 = (100 - 20b + b^2)/4

h^2 = (100-20b+b^2-b^2)/4

h^2= (100-20b)/4

h = √(100-20b)/2

area = (1/2)bh

= (1/2)b(√(100-20b)/2

= (1/4) b√(100-20b)

check my arithmetic

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