The scale factor of a drawing is the measurement of the new representation of an object divided by the corresponding measurement of the original object
The known information are;
The scale factor of the scaled copy Mayra created = 2
The area of Figure C = 28 square units
Mayra suggests that the area of the scaled copy of Figure C = 28 square units
Required:
Convince Mayra that the area of the scaled copy is not 56 square units
Solution:
The relationship between the scale factor of area, SFA, and the scale factor of length, LSF, is given as follows;
Area Scale Factor = (Linear Scale Factor)²
SFA = LSF²
Whereby the linear scale factor, LSF = 2, we have;
Area Scale Factor, SFA = 2² = 4
The area of the scaled copy = Area of Figure C × SFA
∴ The area of the scaled copy of Figure C = 28 × 4 = 112
The area of the scaled copy of Figure C Mayra created = 112 square units
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