After the scale factor is applied to the dimensions of the rectangle shown, choose all that correctly give the new dimension.

Question

New width after a scale factor of 3. 12
cm
B
New length after a scale factor of 4.80
cm

C
New perimeter after a scale factor of 2. 112
cm

New area after a scale factor of 2. 160 cm₴

Answer 1

A. New width after a scale factor of 3: 12 cm * 3 = 36 cm

B. New length after a scale factor of 4: 80 cm * 4 = 320 cm

C. New perimeter after a scale factor of 2: (2 * 80 cm) + (2 * 12 cm) = 160 cm + 24 cm = 184 cm

D. New area after a scale factor of 2: 80 cm * 12 cm * 2 = 1920 cm²