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4. A triangle has side lengths of 12 cm, 15 cm, and 20 cm. Classify it as acute, obtuse, or right.
Question
Asked 2/21/2013 12:20:53 PM
Updated 9/17/2014 3:15:11 AM
1 Answer/Comment
Flagged by yeswey [9/17/2014 3:15:11 AM]
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User: 4. A triangle has side lengths of 12 cm, 15 cm, and 20 cm. Classify it as acute, obtuse, or right.

Question
Asked 2/21/2013 12:20:53 PM
Updated 9/17/2014 3:15:11 AM
1 Answer/Comment
Flagged by yeswey [9/17/2014 3:15:11 AM]
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3
12^2 + 15^2 = 144 + 225 = 369
20^2 = 400
369 < 400
12^2 + 15^2 < 20^2
Thus, It is an obtuse triangle.

Added 9/17/2014 3:15:02 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [9/17/2014 3:35:59 AM]
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