Geometry and TrigonometryMediumScaling a photograph
Geometry and Trigonometry practice question
A photograph 4 inches wide and 10 inches tall is enlarged so that its width becomes 6 inches, keeping the same proportions. How tall, in inches, is the enlarged photograph?
Answer: 15
The scale factor is 6/4 = 1.5, so the height is 15.
Common wrong answers
- If you answered 12
- 12 adds 2 to 10, as if the sides grew by the same amount.
- If you answered 24
- 24 uses a scale factor of 2.4.
- If you answered 6.67
- 6.67 inverts the scale factor.
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