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03-07-2020
Mathematics

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Classify the following triangle as acute, obtuse, or right.
51
78
51
A. Obtuse
B. Right
C. Acute
D. None of these

Classify the following triangle as acute obtuse or right 51 78 51 A Obtuse B Right C Acute D None of these class=

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03-07-2020

Answer:

C. Acute

Step-by-step explanation:

Acute angles are less than 90°
Obtuse angles are greater than 90°, but less than 180°
Right angles are exactly 90°

Extra:

Straight angles are exactly 180° (basically a straight line)
Reflex angles are greater than 180°, but less than 360°

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