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The lengths of the sides of a triangle are given below. Classify the triangle as acute, obtuse, or right.
7, 9, 3

A. Acute Triangle


B. Obtuse Triangle


C. Right Triangle

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mhanifa

Answer:

  • B. Obtuse Triangle

Step-by-step explanation:

Use Pythagorean to identify if the triangle is right:

  • 9² = 7² + 3²
  • 81 = 58

We see the triangle is not right and the difference of the squares tells us the angle opposite to side with measure of 9 is greater than 90°.

It means the triangle is obtuse.

Correct choice is B

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