Scale Factor and Scale

How is the scale factor calculated?

• By multiplying the length of the image or object in the new scale by the length of the image or object in the original scale.

• By subtracting the length of the image or object in the new scale from the length of the image or object in the original scale.

• By adding the length of the image or object in the new scale to the length of the image or object in the original scale.

• By dividing the length of the image or object in the new scale by the length of the image or object in the original scale.

If the scale factor is 2, what happens to the dimensions of an object?

• The dimensions of the object will double.

• The dimensions of the object will triple.

• The dimensions of the object will remain the same.

• The dimensions of the object will halve.

If a line segment is 5 cm long and it is scaled by a factor of 3, what is the length of the new line segment?

• 8 cm

• 12 cm

• 15 cm

• 10 cm

If a rectangle has a length of 8 cm and a width of 4 cm, and it is scaled by a factor of 0.5, what are the dimensions of the new rectangle?

• The dimensions of the new rectangle are 4 cm by 2 cm.

• The dimensions of the new rectangle are 10 cm by 5 cm.

• The dimensions of the new rectangle are 6 cm by 3 cm.

• The dimensions of the new rectangle are 2 cm by 1 cm.

If the scale factor is 0.5, what happens to the dimensions of an object?

• The dimensions of the object are doubled.

• The dimensions of the object are reduced by half.

• The dimensions of the object remain the same.

• The dimensions of the object are increased by half.

If a triangle has a base of 10 cm and a height of 6 cm, and it is scaled by a factor of 2, what are the dimensions of the new triangle?

• The dimensions of the new triangle are a base of 5 cm and a height of 3 cm.

• The dimensions of the new triangle are a base of 15 cm and a height of 9 cm.

• The dimensions of the new triangle are a base of 12 cm and a height of 8 cm.

• The dimensions of the new triangle are a base of 20 cm and a height of 12 cm.

If two similar rectangles have a scale factor of 1:2, and one rectangle has a length of 10 cm, what is the length of the other rectangle?

• 20 cm

• 25 cm

• 5 cm

• 15 cm

A scale factor greater than one creates ....

• reduction

• enlargement

• exact copy

• none of these

A scale factor equal to one creates

• an enlargement

• a reduction

• an exact copy

• none of these

The scale drawing of the car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

• 12 feet

• 16 feet 

• 10 feet

• 4 feet