Geometry: Acute Angle Is Less Than 90 Degrees Practice
Identify and describe angles smaller than a right angle
Geometry: Acute Angle Is Less Than 90 Degrees Practice
Identify and describe angles smaller than a right angle
Geometry - Grade 4-5
- 1
An angle measures 35 degrees. Is it acute? Explain how you know.
Yes, the angle is acute because 35 degrees is less than 90 degrees. - 2
Look at an angle that is smaller than the corner of a square. Is the angle acute, right, or obtuse?
A corner of a square makes a 90 degree angle.
The angle is acute because it is smaller than a right angle, and a right angle measures 90 degrees. - 3
Circle the angle measurement that is acute: 90 degrees, 120 degrees, 45 degrees, or 180 degrees.
The acute angle is 45 degrees because it is less than 90 degrees. - 4
Angle B measures 89 degrees. Is angle B acute? Explain your answer.
An angle can be very close to 90 degrees and still be acute if it is less than 90 degrees.
Yes, angle B is acute because 89 degrees is still less than 90 degrees. - 5
A student says an angle that measures 90 degrees is acute. Is the student correct? Explain.
No, the student is not correct. A 90 degree angle is a right angle, not an acute angle. - 6
Use the diagram to decide which labeled angles are acute: angle A, angle B, and angle C.
Compare each angle to a right angle.
Angles A and C are acute because they are smaller than 90 degrees. Angle B is not acute because it is larger than a right angle. - 7
Order these angle measures from smallest to largest: 75 degrees, 15 degrees, 60 degrees, 89 degrees.
The angle measures from smallest to largest are 15 degrees, 60 degrees, 75 degrees, and 89 degrees. All of them are acute because each is less than 90 degrees. - 8
Draw an acute angle and label it with a possible degree measure.
Choose any angle measure from 1 degree to 89 degrees.
A correct drawing should show an angle smaller than a right angle and label it with a measure less than 90 degrees, such as 40 degrees or 65 degrees. - 9
A pair of scissors is opened slightly. The angle between the blades is about 25 degrees. Is the angle acute, right, or obtuse?
The angle is acute because 25 degrees is less than 90 degrees. - 10
Write three different angle measures that are acute.
Every number you choose should be greater than 0 degrees and less than 90 degrees.
Three possible acute angle measures are 20 degrees, 50 degrees, and 80 degrees because each one is less than 90 degrees. - 11
Angle D is shown smaller than a right angle. If the choices are 30 degrees, 90 degrees, and 130 degrees, which measure could be angle D?
An acute angle must be less than 90 degrees.
Angle D could be 30 degrees because it is the only choice that is less than 90 degrees. - 12
Complete the sentence: An acute angle is an angle that measures blank 90 degrees.
An acute angle is an angle that measures less than 90 degrees.