Types of Angles: Right, Acute, and Obtuse Worksheet

Question 1

An angle makes a perfect square corner, like the corner of a book. What type of angle is it?

Accepted Answer

It is a right angle because it makes a perfect square corner.

Question 2

An angle is smaller than a right angle. What type of angle is it?

Accepted Answer

It is an acute angle because it is smaller than a right angle.

Question 3

An angle is wider than a right angle but not a straight line. What type of angle is it?

Accepted Answer

It is an obtuse angle because it is wider than a right angle but not a straight line.

Question 4

Look at the angle shown. It opens only a little bit. Is it right, acute, or obtuse?

Accepted Answer

The angle is acute because it opens less than a right angle.

Question 5

Look at the angle shown. It opens wide, more than a square corner. Is it right, acute, or obtuse?

Accepted Answer

The angle is obtuse because it opens wider than a right angle.

Question 6

A door is opened just a little. The angle between the door and the wall is small. What type of angle is this?

Accepted Answer

The angle is acute because the opening is smaller than a right angle.

Question 7

A notebook page has four corners. What type of angle is each corner?

Accepted Answer

Each corner is a right angle because each corner makes a square corner.

Question 8

Look at the clock. The minute hand points to 12 and the hour hand points to 3. What type of angle do the hands make?

Accepted Answer

The clock hands make a right angle because they form a square corner.

Question 9

Look at the clock. The minute hand points to 12 and the hour hand points to 2. What type of angle do the hands make?

Accepted Answer

The clock hands make an acute angle because the angle is smaller than a right angle.

Question 10

Look at the clock. The minute hand points to 12 and the hour hand points to 5. What type of angle do the hands make?

Accepted Answer

The clock hands make an obtuse angle because the angle is wider than a right angle.

Question 11

Draw one acute angle. Then write one sentence explaining why it is acute.

Accepted Answer

The drawing should show an angle smaller than a right angle. It is acute because it opens less than a square corner.

Question 12

Draw one right angle. Then write one sentence explaining why it is right.

Accepted Answer

The drawing should show a square corner. It is a right angle because it matches the corner of a square or paper.

Question 13

Draw one obtuse angle. Then write one sentence explaining why it is obtuse.

Accepted Answer

The drawing should show an angle wider than a right angle. It is obtuse because it opens more than a square corner.

Question 14

A triangle has one angle that is larger than a square corner. What type of angle is that angle?

Accepted Answer

That angle is an obtuse angle because it is larger than a right angle.

Question 15

Sort these angles into three groups: right angle, acute angle, and obtuse angle. Angle A is a square corner. Angle B is smaller than a square corner. Angle C is wider than a square corner.

Accepted Answer

Angle A is a right angle. Angle B is an acute angle. Angle C is an obtuse angle.

Types of Angles: Right, Acute, and Obtuse

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