Basic Geometry Formulas

What is the perimeter of this square?

• 4 in.

• 16 in.

• 8 in.

• 20 in

Find the area of this parallelogram.

• 60 in

• 60 in²

• 50 in

• 50 in²

Find the area of this trapezoid.

• 108 cm²

• 132 cm²

• 1848 cm²

• 216 cm²

What Formula is this?

• Area of Triangle

• Perimeter of Circle

• Circumference of Circle

• Area of Circle

A Circle has a radius of 4.  What is the area of the circle? (Best Choice) (note: units are squared)

• 4π or about 12.56

• 16π or about 50.24

• 2π or about 6.28

• 8π or about 25.12

What is the circumference of the circle? (Best Choice)

• 5π or about 15.7 cm

• 10π or about 31.4 cm

• 20π or about 62.8 cm

• 100π or about 314 cm 

A Circle has a diameter of 10 centimeters.  What is the area of the circle? (Best Choice)

• 5π or about 15.7 cm²

• 10π or about 31.4 cm²

• 25π or about 78.5 cm²

• 100π or about 314 cm² 

The distance around a polygon is called the

• area

• perimeter

• volume

• circumference

Find the area of this triangle.

• 20 cm²

• 56 cm²

• 28 cm²

• 27 cm²

What formula is this

• Area Rectangle

• Area Trapezoid

• Area Triangle

• Area Circle