Question 841098
Use the base and leg length to calculate the altitude using Pythagorean theorem.
{{{(8/2)^2+x^2=5^2}}}
{{{16+x^2=25}}}
{{{x^2=9}}}
{{{x=3}}}
For a triangle,
{{{A=(1/2)bh=(1/2)(8)(3)=12}}}