In the figure below, ABC is a triangle with the altitudes AD, BE, and CF. DG is perpendicular to AB and DH is perpendicular to BE. Line EF cuts AD, DH, and DG at P, K, and J, respectively. GH extended cuts AD at L. If PK = 9 and GL = 10, find the measure of JK.
Geometric art is a form of art based on the use and application of geometric figures. A geometric figure is any set or combination of points, lines, surfaces and solids. A mobile app or mobile application software is a computer program designed to run on smartphones and tablet computers.