I need to calculate a10 and a11.

d10=5.51x10^-9 m

d11=4.73x10^-9 m

From d11 and d10, the lattice parameters, a11 and a10, can be calculated. Show your calculations. Use the reference diagram of the hexagonal geometry of the graphite unit cell (from lecture), similar triangles and Pythagorean theorem.

\begin{tabular}{lll} \multicolumn{1}{c}{ ebeam tube geometry } & Diffraction rings & Corresponding \\ D= ring diameter \\ L= target to edge of tube (0.013m) & as seen on tube & hexagonal graphite \\ t=1.5mm & & unit cell geometry \end{tabular}