A triangle has the side lengths of 12 cm, 15 cm, and 20 cm. Classify it as acute, obtuse, or right.
1 answer:
Answer:
Obtuse
Step-by-step explanation:
Plugging the numbers into the Pythagorean Theorem (a^2 + b^2 = c ^2)
20^2 = 12^2 + 15^2
400 > 144 + 225
400 > 369
Because of the Converse of the Pythagorean Theorem, which tells us if c is greater than a+b, it is obtuse
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