Asquare photograph has a perimeter of 20 inches. what is the area of the photograph?

Since it is in fact a square photograph, you divide the perimeter by four. Each side would then be 5 inches, and multiplying two of these sides, 5*5, would give you the area of 25 inches

A square has 4 sides so, area = l×w×h 

20 ÷ 4 = 5
 
5 × 5 = 25, dont forget that each side of a square have the same length

Area = 25in²

You have to find the angle i don’t know if i i try

It is important because sometimes ur dna needs to multiply