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McGraw-Hill Math Grade 7 Answer Key Lesson 25.1 Measuring Angles
Exercises
IDENTIFY
Label the angles as acute, obtuse, or right.
Question 1.
Answer:
Acute,
Explanation:
If two rays intersect at a vertex, forming an angle that is less than 90° is known as acute.
Question 2.
Answer:
Obtuse,
Explanation:
Any angle that is greater than 90° but less than 180° is known as obtuse angle.
Question 3.
Answer:
Right angle,
Explanation:
If the angle formed between two rays is exactly 90° then it is called a right angle.
Question 4.
Answer:
Acute,
Explanation:
If two rays intersect at a vertex, forming an angle that is less than 90° is known as acute.
Question 5.
Answer:
Obtuse,
Explanation:
Any angle that is greater than 90° but less than 180° is known as obtuse angle.
Question 6.
Answer:
Acute,
Explanation:
If two rays intersect at a vertex, forming an angle that is less than 90° is known as acute.
Question 7.
∠DEF = _____________
Answer:
Right angle,
Explanation:
If the angle formed between two rays is exactly 90° then it is called a right angle.
Question 8.
∠RST = _____________
Answer:
Obtuse,
Explanation:
Any angle that is greater than 90° but less than 180° is known as obtuse angle.
Question 9.
∠LMN = _____________
Answer:
Obtuse,
Explanation:
Any angle that is greater than 90° but less than 180° is known as obtuse angle.
Question 10.
∠QRS = ______________
Answer:
Acute,
Explanation:
If two rays intersect at a vertex, forming an angle that is less than 90° is known as acute.
Question 11.
∠ABC = ______________
Answer:
Acute,
Explanation:
If two rays intersect at a vertex, forming an angle that is less than 90° is known as acute.
Question 12.
∠GHI = ______________
Answer:
Obtuse,
Explanation:
Any angle that is greater than 90° but less than 180° is known as obtuse angle.