Scale Drawings And Similar Figures

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or a place that is proportionally reduced or enlarged to a specific scale.

Front

What does 'similar figures' mean?

Back

Similar figures are shapes that have the same shape but may differ in size. Their corresponding angles are equal, and their corresponding sides are in proportion.

Front

How do you find the perimeter of a shape?

Back

To find the perimeter, add the lengths of all the sides of the shape.

Front

If a scale is 1 in = 5 ft, how do you convert 3 inches to feet?

Back

Multiply 3 inches by 5 ft/inch to get 15 ft.

Front

What is the scale factor?

Back

The scale factor is the ratio of the dimensions of the model to the dimensions of the actual object.

Front

How do you calculate the new perimeter after enlarging a shape by a scale factor?

Back

Multiply the original perimeter by the scale factor.

Front

If a model is built at a scale of 1:10, what does this mean?

Back

It means that 1 unit on the model represents 10 units in real life.

Front

What is the formula for finding the area of similar figures?

Back

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

Front

If a rectangle has a perimeter of 20 cm, what is the perimeter if enlarged by a scale factor of 3?

Back

The new perimeter is 60 cm (20 cm x 3).

Front

How do you find the actual distance using a scale?

Back

Multiply the distance on the map by the scale factor to find the actual distance.