Fill in the blank: An acute angle is defined as an angle that measures less than ___ degrees.

90

True or False: An obtuse angle is defined as being smaller than a right angle.

False: An obtuse angle is greater than 90 degrees but less than 180 degrees.

What tool can be used to compare the sizes of angles for precision?

Tracing paper and a ruler can be used to compare the sizes of angles for precision.

Fill in the blank: The length or thickness of the lines forming an angle does not affect the angle's ___ .

Size

List the three types of angles based on their size.

Right angle, acute angle, obtuse angle.

Fill in the blank: An obtuse angle is larger than a right angle but smaller than ___ degrees.

180

An angle that measures ___ degrees is known as a right angle.

90 degrees

True or False: Three right angles equal 360 degrees.

False, three right angles equal 270 degrees.

I am an angle that is half of a right angle. What am I?

45 degrees

Fill in the blank: An angle between 90 degrees and 180 degrees may be closer to ___ degrees.

135 degrees

If an angle measures less than 90 degrees, it is classified as ___.

Acute

True or False: An angle measuring exactly 180 degrees is considered obtuse.

False; an angle measuring exactly 180 degrees is a straight angle.

An angle that is greater than 90 degrees but less than 135 degrees is classified as ___.

Obtuse