"What is the area? You should be able to solve this"

[Gerson W. Barbosa]

(08-06-2018 11:54 PM)rprosperi Wrote:  

(08-06-2018 10:52 PM)Albert Chan Wrote:  20 cm^2 + sx = 16 cm^2 + 32 cm^2

-> sx = 28 cm^2

I don't follow the explanation at all (don't worry, it's me, not you), but it doesn't seem like the final steps shown above are correct. They seem to imply sx = SQRT(880) = 29.66, don't they?

These are area units (cm^2 = square centimeters). Perhaps cm2 (without the caret symbol) might have avoided the confusion.

All solutions and comments welcome! (Linear Algebra, Analytic Geometry, Geometry...). Thank you all for your interest and contributions.

Gerson.