Leysa l^2=sqrt{h^2+r^2}

$$l ^ { 2 } = \sqrt { h ^ { 2 } + r ^ { 2 } }$$

Leystu fyrir h (complex solution)

$$h=-\sqrt{l^{4}-r^{2}}$$

$$h=\sqrt{l^{4}-r^{2}}$$

Leystu fyrir h

$$h=\sqrt{l^{4}-r^{2}}$$

$$h=-\sqrt{l^{4}-r^{2}}\text{, }|l|\geq \sqrt{|r|}$$

Leystu fyrir l

$$l=\sqrt[4]{r^{2}+h^{2}}$$

$$l=-\sqrt[4]{r^{2}+h^{2}}$$