7th 8-1 Scale Drawings

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or area that maintains the proportions of the original, using a specific ratio to convert actual measurements into a smaller or larger size.

Front

How do you determine the scale of a drawing?

Back

The scale of a drawing is determined by the ratio of a measurement on the drawing to the corresponding measurement in reality, expressed in the form 'drawing unit : actual unit'.

Front

If a scale is 1 cm : 5 m, how many centimeters represent 20 meters?

Back

4 cm (since 20 m is 4 times 5 m).

Front

What is the formula to convert a measurement from a scale drawing to actual size?

Back

Actual size = Measurement on drawing × (Actual size unit / Drawing size unit).

Front

In a scale drawing, if 1 inch represents 12 feet, how long is a 36-foot object in the drawing?

Back

3 inches (since 36 feet is 3 times 12 feet).

Front

What is the importance of using scale in drawings?

Back

Using scale in drawings allows for accurate representation of large objects or areas in a manageable size, making it easier to visualize and plan.

Front

How do you convert inches to feet in a scale drawing?

Back

To convert inches to feet, divide the number of inches by 12, since there are 12 inches in a foot.

Front

If a drawing has a scale of 1 cm : 2 ft, what is the actual length of a model that is 5 cm long?

Back

10 ft (since 5 cm × 2 ft/cm = 10 ft).

Front

What is the relationship between the scale and the size of the drawing?

Back

The scale determines how much smaller or larger the drawing is compared to the actual object; a larger scale ratio means a smaller drawing.

Front

How do you find the height of an object in a scale drawing if the scale is 1/2 inch = 8 feet?

Back

To find the height, divide the actual height by the scale factor (8 feet) and multiply by the drawing unit (1/2 inch).