jess.shen2024

First, label the appropriate diagram of the parallelogram. If the diagonals are perpendicular to each other, then the sides of ABCD has to be 5.

use the equation for obtuse triangles

\(AB^2>25=3^2+4^2=AE^2+BE^2\)

all four angles around E, would be obtuse, which you can figure out to be impossible, so the side can't be longer than 5

Thank you both to heureka and Melody! I read the article, and used heureka's method to find another way to solve the problem.

this is a simple ratios and proportions question

since 1 us dollar= 120 isk, all you need to do is to divide these two numbers because you are trying to find U.S dollars

so 2370 isk/120isk = 19.75

$19.75 where a = 1, b= 9, c= 7, and d=5