Scale Factor Exit Ticket

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to determine the proportional relationship between two similar figures.

Front

How do you find the scale factor between two similar triangles?

Back

To find the scale factor, divide the length of a side of the larger triangle by the corresponding side of the smaller triangle.

Front

If triangle ABC has a side length of 4 cm and triangle DEF has a side length of 2 cm, what is the scale factor from triangle ABC to triangle DEF?

Back

1/2

Front

In a scale drawing, if 1 inch represents 20 feet, how many feet does 3 inches represent?

Back

60 feet (3 inches x 20 feet/inch = 60 feet).

Front

What is the actual length of an object if it measures 2.5 inches on a scale drawing where 1 inch = 15 feet?

Back

37.5 feet (2.5 inches x 15 feet/inch = 37.5 feet).

Front

How do you calculate the area of a rectangle?

Back

Area = length x width.

Front

If a rectangle has a length of 10 feet and a width of 5 feet, what is its area?

Back

50 square feet (10 feet x 5 feet = 50 square feet).

Front

What is the formula for calculating the perimeter of a rectangle?

Back

Perimeter = 2(length + width).

Front

If a rectangle has a length of 10 feet and a width of 5 feet, what is its perimeter?

Back

30 feet (2(10 feet + 5 feet) = 30 feet).

Front

What does it mean if a scale drawing has a scale of 1:100?

Back

It means that 1 unit on the drawing represents 100 units in reality.