



 
Hi Devon, Suppose the triangle is ABC and the length of each side is a units. If you draw a line from A to meet the line BC at D and this line is perpendicular to BC then the length of AD is the height h of the triangle. The point D is the midpoint of BC (do you see why?) and hence the length of DC is a/2. Since triangle ADC is a right triangle you can use Pythagoras' theorem to find a. Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 