Acute Angle Practice

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Question 1
Which of the following are acute angles?

identify all the acute angles

Answer

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A. I and III
B. I and II
C. II and IV
D. II and III
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Step by Step Solution 

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Step 1
Angle I is definitely an acute angle:
Angle I is an acute angle
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Step 2
As for angle II, it is also an acute angle. This is because this angle is somewhere in between 0° and 90°.
Angle II is an acute angle

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Step 3
Angle III is not an acute angle as it is greater than 90°.
Angle III is not an acute angle
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Step 4
Again, angle IV is not an acute angle as this angle is greater than 90°.
Angle IV is not an acute angle
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Step 5
Clearly, only I and II are acute angles. Hence, the answer is B.
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