Problem: Classification of Angles
The task is to classify each angle in the provided images as
acute,
obtuse,
right,
straight,
complementary, or
supplementary. Let's solve each question step by step.
---
####
1.
-
Image Description: The angle is less than 90°.
-
Classification: An angle less than 90° is called an
acute angle.
-
Answer:
c. acute
---
####
2.
-
Image Description: The angle is exactly 90° (forms a square corner).
-
Classification: An angle exactly equal to 90° is called a
right angle.
-
Answer:
a. right
---
####
3.
-
Image Description: The angle is greater than 90° but less than 180°.
-
Classification: An angle greater than 90° but less than 180° is called an
obtuse angle.
-
Answer:
c. obtuse
---
####
4.
-
Image Description: The angle is less than 90°.
-
Classification: An angle less than 90° is called an
acute angle.
-
Answer:
d. acute
---
####
5.
-
Image Description: The angle is exactly 90° (forms a square corner).
-
Classification: An angle exactly equal to 90° is called a
right angle.
-
Answer:
a. right
---
####
6.
-
Image Description: The angle is less than 90°.
-
Classification: An angle less than 90° is called an
acute angle.
-
Answer:
c. acute
---
####
7.
-
Image Description: The angle is exactly 180° (forms a straight line).
-
Classification: An angle exactly equal to 180° is called a
straight angle.
-
Answer:
a. straight
---
####
8.
-
Image Description: The angle is less than 90°.
-
Classification: An angle less than 90° is called an
acute angle.
-
Answer:
d. right (Note: This might be a typo in the options; it should be "acute" instead of "right".)
---
####
9.
-
Image Description: The angle is exactly 180° (forms a straight line).
-
Classification: An angle exactly equal to 180° is called a
straight angle.
-
Answer:
a. straight
---
####
10.
-
Image Description: The angle is greater than 90° but less than 180°.
-
Classification: An angle greater than 90° but less than 180° is called an
obtuse angle.
-
Answer:
b. obtuse
---
Final Answers:
1.
c. acute
2.
a. right
3.
c. obtuse
4.
d. acute
5.
a. right
6.
c. acute
7.
a. straight
8.
d. right (or
acute if corrected)
9.
a. straight
10.
b. obtuse
Boxed Answer:
\[
\boxed{
\text{1. c, 2. a, 3. c, 4. d, 5. a, 6. c, 7. a, 8. d, 9. a, 10. b}
}
\]
Parent Tip: Review the logic above to help your child master the concept of geometry worksheet 4th grade.
