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The ratio of the lengths of corresponding sides in similar figures (same shape but different size) is called scale factor. It may be expressed as a fraction, decimal, percent, or whole number.
The scale factor from Fig A to Fig B is 3/6 = ½. The scale factor from Fig B to Fig A is 6/3 = 2 6 cm 3 cm Fig A Fig B
A rectangle has sides of 3 cm and 5 cm. A similar rectangle is dilated with a scale factor of ½. Find its length and width. 6 cm by 10 cm 2 cm by 3 cm 1.5 cm by 2.5 cm 2 cm by 2.5 cm
A rectangle has sides of 3 cm and 5 cm. A similar rectangle is dilated by a scale factor of 2. Find its dimensions. 6 cm by 10 cm 2 cm by 3 cm 1.5 cm by 2.5 cm 2 cm by 2.5 cm If we know one shape's perimeter and the scale factor, we can find the other shape's perimeter by multiplying the original perimeter by the scale factor. If the first shape has a perimeter of 16 cm and is dilated by a scale factor of ½, the second shape's perimeter is... Perimeter = 16 80 cm 5 32 cm 3 8 cm 2.5 80 cm 1.5 If the perimeter is of a shape is 16 cm and is dilated with scale factor of 2, the perimeter of the similar shape is... 8 cm 5 32 cm 3 80 cm 3200 cm a copy a reduction If the scale factor is greater than 100%, then the resulting drawing is: an enlargement If the scale factor is less than 100%, then the resulting drawing is: a reduction a copy an enlargement The perimeter of a triangle is 9 cm. The triangle is dilated by a scale factor of 2. Find the perimeter of the new triangle. cm Figure A is dilated creating Fig B.
What is the scale factor from Fig A to Fig B?
What is the perimeter of Fig A?
What is the perimeter of Fig B? Fig A 3 3 Fig B 9 square units units 9 A rectangle is dilated with a scale factor of 3. Which statement correctly describes the perimeter of the new figure? The new perimeter is 1/9 times the original The new perimeter is 1/3 times the original The new perimeter is 3 times the original The new perimeter is 9 times the original A rectangle is dilated with a scale factor of ⅓. Which statement correctly describes the perimeter of the new figure? The new perimeter is 1/9 times the original The new perimeter is 1/3 times the original The new perimeter is 3 times the original The new perimeter is 9 times the original |