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Please help!! Find the radius

Please help!! Find the radius
165k views
4 votes
Please help!!
Find the radius

Please help!! Find the radius-example-1
User Feng Chen
by
7.8k points

1 Answer

2 votes

Answer:

The radius is 20 units.

Explanation:

(r)^2 + 21^2 = (r+9)^2

r^2 + 441 = r^2 + 18r + 81

360 - 18r = 0

360 = 18r

20 = r

User Kup
by
8.3k points
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