Scale Drawing #2 - perimeter and area

Front

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

Back

Perimeter = sum of all sides

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity.

Front

If a triangle has sides of lengths 10, 12, and 14, what is its perimeter?

Back

Perimeter = 10 + 12 + 14 = 36

Front

How do you find the area of a rectangle?

Back

Area = length × width

Front

What is the area of a square with a side length of 5 inches?

Back

Area = 5 in × 5 in = 25 in²

Front

If a scale drawing uses a scale of 1 inch = 10 feet, how many feet does 3 inches represent?

Back

3 inches = 3 × 10 feet = 30 feet

Front

What is the area of a rectangle with a length of 8 cm and a width of 3 cm?

Back

Area = 8 cm × 3 cm = 24 cm²

Front

What is the relationship between the scale factor and the area of similar figures?

Back

The area of similar figures is proportional to the square of the scale factor.

Front

If a garden has a length of 20 feet and a width of 15 feet, what is its perimeter?

Back

Perimeter = 2 × (20 + 15) = 70 feet

Front

What is the scale factor if the original shape is 4 times larger than the scale drawing?

Back

Scale factor = 1/4