CPM Homework Help : MC2 Problem 10-109

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10-109.

Find the missing length on this right triangle.

Hint:

Use the Pythagorean theorem.

Step 1:

$7^2 + x^2 = 30^2$

Step 2:

$49 + x^2 = 900$

Step 3:

$x^2 = 851$

Answer:

${\it x} = \sqrt{851} \approx 29.17\text{ mm}$

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