step-by-step explanation:
this is not possible to solve with the info given. you need at least an one angle somewhere.
7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.
23/3 * 15/2 = 57 1/2
the photograph is photographer and- in the process- ourselves.