The trig ratio that we would use is [tex]sin \theta = \frac{opp. leg}{hyp} [/tex] Plugging in the values we get the following equation [tex]sin20^o= \frac{15}{h} [/tex] Looks tricky but you just need to interchange sin 20 and h [tex]h= \frac{15}{sin20^o} [/tex] You probably need to make sure your calculator is in degree mode. hypotenuse is approximately 43.86