Shape Area Scale Factor

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

What is the scale factor if the triangle on the left is the original?

• 2

• 3/2

• 2/3

• 1/2

If the scale factor is less than one, the new figure will be

• an enlargement

• a reduction

• a scale factor

• bigger

If the scale factor is greater than one, the new figure will be

• reduction

• enlargement

• scale

• not proportional

In the figure above, a dilation from A to A' has occurred. What is the scale factor?

scale factor = _______

Mathematical Equivalence

ON

The two rectangles are scale drawings. What is the measurement of x?

• 21

• 1.25

• 20

• 4

In the figure above, a dilation from A to A' has occurred. What is the scale factor?

Mathematical Equivalence

ON

what is the length of x?

• 9mm

• 4mm

• 4/9mm

• 36mm

A scale drawing that measures 8 units wide and an original that measures 4 units wide has a scale factor of...

• 2:1

• 8:1

• bigger

• 1:2

What shape is the base? What is the area of the base (B)?

• Rectangle; 60in²

• Triangle; 12 in²

• Rectangle; 32 in²

• Triangle; 6 in²