a right triangle. and in the future use this desmos.com to you
solve for 'h': h > 5 in.
the formula for the area of a triangle is: area = , where 'b'=the length of the base and 'h' = the height. since the area of the sign must be more than 15 in², the inequality must be '> 15 in²'.
using the formula for area and the given values, we can set up the following inequality:
solving for 'h', we can first multiply both sides by :
divide both sides by 6: 6h/6 > 30/6
solve for h: h > 5in