12 sq. cm.

6 sq. cm.

12 cm

6 cm

Length x Width

1/2 (Length x width)

1/3 (Length x width)

Base x Height

A=b x h

A=1/2 x b x h

A=1/2 x (b1 x b2) x h

A=b x b

50 in.

25 in.

45 in. 

100 in.

140 cm²

70 cm²

34 cm²

64 cm²

20 cm

21 cm

40 cm

12.5 cm

20 units²

28 units²

35 units²

quadrilateral

quadrilateral, parallelogram

quadrilateral, rectangle

quadrilateral, rhombus

the distance around a shape

half the distance around a shape

the amount of space outside a shape

the amount of space inside a shape

The measure of the amount of space inside of a solid figure

The sum of all the areas of all the shapes that cover the object