Vocabulary
What is the original figure before a dilation called?
It is called the pre-image.
An original circle has a circumference of 15 centimeters. It is dilated by a scale factor of 3. What is the circumference of the new figure?
A rectangle has a base of 6 feet and a height of 5 feet. It is dilated by a scale factor of 4. What is the new area of the rectangle?
The area of the new rectangle is 480 feet2.
A cube has a side of 7 inches. The cube is dilated by a scale factor of 2. What is the volume of the new cube?
The volume of the new cube is 2744 inches3.
Write 0.000123 in scientific notation.
1.23 x 10-4
What is the new figure after a dilation called?
It is called the image.
A rectangle has a base of 14 inches and a height of 4 inches. It is dilated by a scale factor of 2. What is the perimeter of the new rectangle?
The perimeter of the new rectangle is 72 inches.
A rectangle has a base of 7 inches and a height of 8 inches. The rectangle is dilated by a scale factor of 1/2. What is the new area of the rectangle?
The area of the new rectangle is 14 inches2.
The volume of the new prism is 32,400 feet3
Solve 5x - 6 = 2x + 6
x = 4
What is the formula for scale factor?
The formula for scale factor is new divided by original.
The perimeter of a triangle is 12 meters, and it is dilated using a scale factor of 3/4. What is the perimeter of the new triangle?
The perimeter of the new triangle (P') is 9 meters.
The area of the new triangle is 960 cm2.
The volume of a cube is 120 inches3. The cube is dilated using a scale factor of 1/2. What is the new volume of the cube?
The volume of the new cube is 15 inches3.
Sam makes $15 per hour plus a $30 bonus. Tim makes $20 per hour and no bonus. Write an equation to show when Sam and Tim will make the same amount of money.
15h + 30 = 20h
What is a dilation resulting from a scale factor greater than one called?
Hint: It starts with "e."
It is called an enlargement.
The radius of a circle is 3. The circle is dilated using a scale factor of 2. What is the new circumference of the circle in terms of pi?
Example: 2 pi
A triangle has a base of 4 in. and a height of 8 in. The triangle is dilated by a scale factor of 1/3. What is the area of the new triangle?
The area of the new triangle is roughly 1.7, repeating.
A prism has a length (in feet) of 5, width of 4, and height of 3. The prism is dilated using a scale factor of 2. What is the new volume of the prism?
Sam makes $15 per hour plus a $30 bonus. Tim makes $20 per hour and no bonus. How many hours do they have to work until both make the same amount of money?
6 hours.
Hint: It starts with "r."
It is called a reduction.
A right triangle has legs 5 feet and 12 feet. It is dilated by a scale factor of 5. What is the perimeter of the new triangle?
The perimeter of the new triangle is 150 feet.
The area of the new circle is 324 pi .
The volume of a cube is 64 centimeters3. What is the new volume of the cube if it is dilated using a scale factor of 3/4?
How many people read and take notes from Google Classroom? Make me laugh.
(Laughter)