Question 1009481
{{{drawing(400,16000/119,-1,10.9,-1,3,triangle(0,0,9.9,0,9.9,2),
locate(4.7,0,9.9),locate(10,1.2,2),locate(4.7,1.5,x)


) }}}{{{matrix(5,1,

x^2=9.9^2+2^2,x^2=98.01+4,x^2=102.01,x=sqrt(102.01),x=10.1)}}}