Geometry Review!

Formulas

100

What is the formula to find area of a rectangle?

What is 

A = lw 

OR

A = bh

200

What is the formula for finding area of a triangle?

What is 

A = bh/2

OR 

A = 1/2 bh

300

What is the formula to find the area of a trapezoid?

What is

A = h(b₁ + b₂)/2

OR

A = 1/2 h(b₁ + b₂)

400

What is the formula to find the volume of a rectangular prism?

What is V = lwh

500

1.) What is surface area? 

2.) How would you label your final answer with units?

1.) What is the total area of all faces of a 3D figure.

Example: If you are finding the surface area of a cube, the surface area is the sum of the area of the 6 faces.

2.) What is square units - because it is still 2 dimensions.

Area and Perimeter

100

You have a rectangular garden in your yard.  The area of the garden is 75 square feet.  The length of your garden is 10 feet long.  What is the width?

What is 7.5 square feet.

200

Find the area AND perimeter of a parallelogram with the following measurements (hint: you may want to draw and label a parallelogram):

base = 10 cm

width = 7 cm

height = 5 cm

What is:

perimeter = 34 cm

area = 50 cm²

300

Your patio is the shape of a trapezoid.  The dimensions are shown below:

bases: 10 yards, 8 yards

width: 6 yards

height: 5 yards

Question: How much area does your patio cover?

45 yards²