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Formulas
Triangles
Parallelograms
Surface Area
100

What is the formula for finding the area of a rectangle?

Area - length x width

100

In order to find the height of a triangle with a given base, the height has to be _______________ to the base?

Perpendicular

100

Find the area of a parallelogram that is 

Length = 2

Width = 6

Area = 12

100

What is Surface Area

Definition.

The surface area of a figure is the number of unit squares it takes to cover the entire surface without gaps or overlaps.

200

What is the formula for finding the area of a parallelogram?

Area = length x width

or 

Area - base x height

200

Find the area of a triangle whose

BASE = 3 

HEIGHT = 8

Area = 12

200

What shapes are a parallelogram?

1.  Triangle

2. Trapezoid

3. Rectangle

4. Rhombus

Rectangle

Rhombus

200

Use this rectangular prism.  How many

Faces

Edges

Vertices

Does it have?

Faces = 6

Edges = 12

Vertices. = 8

300

What is the formula for finding the area of a triangle?

Area = Base times height divided by 2

300

Amelia and Marco disagreed on the area of a triangle whose BASE = 12 and HEIGHT = 15.

Amelia said the AREA = 90

Marco said the AREA -= 180

Who is correct?  Why

Amelia is correct.  Marco did not divide the area in half.

To find the Area of a triangle, you have to find 

lxw and divide by 2

300

Select all statements that are true about bases and heights in a parallelogram.

A. Only a horizontal side of a parallelogram can be a base.

B. Any side of a parallelogram can be a base.

C. A height can be drawn at any angle to the side chosen as the base.

D. A base and its corresponding height must be perpendicular to each other.

E. A height can only be drawn inside a parallelogram.

F. A height can be drawn outside of the parallelogram, as long as it is drawn at a 90-degree angle to the base.

G. A base cannot be extended to meet a height.

B, D, F

300

A rectangular prism is

4 Units High

2 Units Wide

6 Units Long.

What is the surface area in square inches?

88 square units

400

How would you find the area of a square that has a length of 6cm?

All sides are the same length on a square. You would multiply 6 x 6 = 36?

400

Select all the statements that are true about bases and heights in a triangle.

  1. Any side of a triangle can be a base.
  2. There is only one possible height.
  3. A height is always one of the sides of a triangle.
  4. A height that corresponds to a base must be drawn at an acute angle to the base.
  5.  A height that corresponds to a base must be drawn at a right angle to the base.
  6. Once we choose a base, there is only one segment that represents the corresponding height.
  7.  A segment representing a height must go through a vertex.


1 & 5

400

Which of the following pairs of base and height produces the greatest area? (All measurements are in centimeters.)

Select the correct choice.

A.    b=4, h=3.5
B.    b=0.8, h=20
C.    b=6, h=2.25
D.    b=10, h=1.4



B

400

What is the surface area of a rectangular prism whose

LENGTH = 11

WIDTH = 5

HEIGHT = 3

SA = 206

500

What is the formula for finding volume?

Volume = length x width x height

500

Draw a triangle with an area of 12 square units.

Show me your work.

500

The Willis Tower (Sears Tower) in Chicago, IL is 1,450ft tall, standing with 110 floors. And is 225 feet wide. What is the area in feet?

326,250

500

What is the Surface Area of a Rectangular Prism whose

Length = 7.5

Width = 4

Height = 2.5

SA = 117.5