Practice with the help of Spectrum Math Grade 5 Answer Key Chapter 9 Lesson 9.4 Classifying Angles regularly and improve your accuracy in solving questions.
Spectrum Math Grade 5 Chapter 9 Lesson 9.4 Classifying Angles Answers Key
A protractor is used to measure an angle. The angle is measured in degrees.
A right angle measures exactly 90°.
An acute angle measures less than 90°.
An obtuse angle measures greater than 90° but less than 180°.
Identify each angle as right, acute, or obtuse.
Question 1.
a.
Type of Angle ______________
Answer: Acute angle
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
b.
Type of Angle ______________
Answer: Acute angle
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
Question 2.
a.
Type of Angle ______________
Answer: Obtuse angle
The type of angle in the above figure is obtuse angle.
An obtuse angle measures greater than 90° but less than 180°.
b.
Type of Angle ______________
Answer: Acute angle
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
Question 3.
a.
Type of Angle ______________
Answer: Right angle
The type of angle in the above figure is right angle.
A right angle measures exactly 90°.
b.
Type of Angle ______________
Answer: Obtuse angle
The type of angle in the above figure is obtuse angle.
An obtuse angle measures greater than 90° but less than 180°.
Use a protractor to measure each angle. Then, label each angle right, acute, or obtuse.
Question 1.
a.
∠ ____________ = ____________
Answer: ∠ ABC = 60 degrees
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
b.
∠ ____________ = ____________
Answer: ∠ GHI = 90 degrees
The type of angle in the above figure is right angle.
A right angle measures exactly 90°.
Question 2.
a.
∠ ____________ = ____________
Answer: ∠ PQR = 110 degrees
The type of angle in the above figure is obtuse angle.
An obtuse angle measures greater than 90° but less than 180°.
b.
∠ ____________ = ____________
Answer: ∠ XYZ = 170 degrees
The type of angle in the above figure is obtuse angle.
An obtuse angle measures greater than 90° but less than 180°.
Question 3.
a.
∠ ____________ = ____________
Answer: ∠ 123 = 90 degrees
The type of angle in the above figure is right angle.
A right angle measures exactly 90°
b.
∠ ____________ = ____________
Answer: ∠ ABC = 30 degrees
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
Find the measure of each angle of the given triangle. Label each angle as right, acute, or obtuse.
Question 4.
a.
∠ ____________ = ____________
It is _______________.
∠ ____________ = ____________
It is _______________.
∠ ____________ = ____________
It is _______________.
Answer:
∠ ABC = 60 degrees
It is Acute angle.
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
∠BCA = 60 degrees
It is Acute angle.
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
∠ CAB= 60 degrees
It is Acute angle.
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
b.
∠ ____________ = ____________
It is _______________.
∠ ____________ = ____________
It is _______________.
∠ ____________ = ____________
It is _______________.
Answer:
∠ XYZ = 90 degrees
It is Right angle.
The type of angle in the above figure is right angle.
A right angle measures exactly 90°
∠ YZX = 45 degrees
It is Acute angle.
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.
∠ ZXY = 45 degrees
It is Acute angle.
The type of angle in the above figure is acute angle.
An acute angle measures less than 90°.