How to write an expression for the area of a rectangle, with one side of the length 10b cm and the width of one side being 5b cm?

Answer 1

Rectangles have 4 sides. The sides that are opposite (across from) each other have the same measure. The long pair is traditionally called the length (l). The short pair is the width (w).

The formula for the area of a rectangle is l * w (* is read times). In your case it would be (10b cm) * (5b cm). What do you get when you do the multiplication?