Let’s go through each question one by one and explain the correct answers based on geometry fundamentals.
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Question 1: A right angle is at what degree?
- A
right angle is defined as an angle that measures exactly
90 degrees.
- This is a standard definition in geometry.
✔ Correct Answer:
D. 90
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Question 2: Name this angle.
*(Image shows an angle that is clearly less than 90° — it's “sharp” or narrow.)*
- An
acute angle is any angle measuring
less than 90°.
- A
right angle is exactly 90° (has a square corner mark).
- An
obtuse angle is greater than 90° but less than 180°.
Since the angle shown is visibly smaller than a right angle, it’s
acute.
✔ Correct Answer:
D. acute
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Question 3: Name this angle.
*(Image shows an angle that is clearly wider than a right angle — more open, but not straight.)*
- This angle is
greater than 90° but
less than 180°, so it’s an
obtuse angle.
✔ Correct Answer:
D. obtuse
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Question 4: Name this angle.
*(Image shows two lines meeting with a small square symbol — the universal symbol for a right angle.)*
- The square symbol means
exactly 90° →
right angle.
✔ Correct Answer:
B. right
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Question 5: Another name for a right angle is ________.
- While “right angle” is the most common term, in some contexts (especially older or architectural), a right angle is also called a
“square angle” because it forms the corner of a square.
- It’s not technically incorrect, though “right angle” is the standard modern term.
✔ Correct Answer:
B. square angle
> Note: In strict mathematical terminology, “square angle” isn’t commonly used — but since it’s presented as an option and matches the context of the quiz (“Angles not Angels”), and given that the other option is “none of the above”,
B is the best available choice.
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✔ Final Answers:
1.
D. 90
2.
D. acute
3.
D. obtuse
4.
B. right
5.
B. square angle
Let me know if you’d like explanations for the remaining 13 questions too!
Parent Tip: Review the logic above to help your child master the concept of 4th grade angles worksheet.
