Question

Find the missing value
Put answer in simplest form
Please Show Your Work

Answer 1

when running a line, in a right-triangle, from the 90° angle perpendicular to its opposite side, we will end up with three similar triangles, one Small, one Medium and a containing Large one. Check the picture below.

`\cfrac{x}{7}=\cfrac{28}{x}\implies x^2=196\implies x=√(196)\implies x=14`