Question 1198253


use {{{sin(theta) }}}in a right angle triangle is the ratio of its perpendicular to its Hypotenuse

We know that the length (Hypotenuse) of the ramp is{{{ 23}}} feet, while the height (Perpendicular) of the ramp is {{{7 }}}feet. 

Thus, 
{{{sin(theta)=7/23}}}
{{{theta=sin^-1(7/23)}}}
{{{theta=17.72}}}°