Marks' first lessons in geometry / In two parts. Objectively presented, and designed for the use of primary classes in grammar schools, academies, etc.

by Bernhard Marks

LESSON THIRTIETH.

MEASUREMENT OF SURFACES.

In Fig. 1 (Diagram [23].) call the line a b a unit.

Rectangle 1 is how many units long?

How many high?

Because its sides are equal, what is it called?

Rectangle 2 is how many units long?

How many high or wide?

How many squares does it contain?

Rectangle 3 is how many units long?