2 years ago

Find the value of r.

Mathematics

1 answer:

fgiga [73]2 years ago

6 0

Answer:

r = 10.5

Step-by-step explanation:

using the Pythagorean theorem:

(7 + r)² = 14² + r²

49 + 14r + r² = 196 + r²

subtract r² from both sides of the equation:

14r + 49 = 196

subtract 49 from both sides:

14r = 147

divide both sides by 14:

r = 10.5

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