Question 388933
Circle diameter of 10
Area of Circle is 
A=πr^2
A=π10^2
{{{A=100π}}}

Area of Triangle is Hight*Base/2
Using Pythagorean THM
{{{A^2+B^2=C^2}}}
{{{8^2+B^2=10^2}}}
{{{64+B^2=100}}}
{{{B^2= 36}}}
{{{B=6}}}

Area of Triangle
{{{Hight*Base/2}}}
{{{(8*6)/2}}}
{{{48/2}}}
{{{24}}}

% landing in triangle 
Area of Triangle/Area of Circle
24/100π = 24/314.2 = 0.08%