Posted by byran on Monday, October 12, 2009 at 12:28pm.
the altitude of a triagnle is 2cm shorter then its base. the area is 15cm squared. determine the base of the triangle.

math  MathMate, Monday, October 12, 2009 at 1:49pm
Assuming "15cm squared." means 15 cm² (and not (15 cm)²).
Let
b=base of triangle
b(b2)/2 = 15
solve for b (it's a quadratic equation).