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Answer:
Prat 9)
Part 10)
Part 11)
Part 12)
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its areas is equal to the scale factor squared
Let
SF-----> the scale factor
a----> area of the shaded figure
b----> area of the unshaded figure
Problem 9) we have
substitute in the formula
------> the scale factor
To find the value of x, multiply the length of the unshaded figure by the scale factor
Problem 10) we have
substitute in the formula
------> the scale factor
To find the value of x, multiply the length of the unshaded figure by the scale factor
Problem 11) we have
substitute in the formula
------> the scale factor
To find the value of x, multiply the length of the unshaded figure by the scale factor
Problem 12) we have
substitute in the formula
------> the scale factor
To find the value of x, divide the length of the shaded figure by the scale factor