Assess Yourself
How well do you understand the ideas in this lesson?
Goal:
Goal:
Show What You Know!
Are you ready to take this lesson's quiz? These questions will help you find out. Go back to the lesson if you do not know an answer.
Look at the rectangle. What kind of angles do you see?
- Acute Angles
- Obtuse Angles
- Right Angles
Sorry! These are not acute angles. There are four square corners. What kind of angles form square corners?
Try again! These are not obtuse angles. What kind of angles form square corners?
Correct! There are four square corners. This rectangle has four right angles.
Look at this picture of Mount Fuji in Japan. What kind of angle do you see?
- Acute angle
- Obtuse angle
- Right angle
Try again. Think to yourself, Is this angle less than 90 degrees?
Well done! This angle is greater than 90 degrees
Think to yourself, Is this angle exactly 90 degrees?
Look at the shape. How many obtuse angles do you see?
- 2
- 3
- 4
Correct! There are two angles opposite each other that are obtuse angles.
Try again. Count how many angles are greater than 90 degrees.
Try again. Count how many angles are greater than 90 degrees.
Look at the shape. How many acute angles do you see?
- 4
- 3
- 2
Try again. Count the angles that measure less than 90 degrees.
Try again. Count the angles that measure less than 90 degrees.
Well done! There are two angles that are less than 90 degrees.
Caleb drew this angle and labeled it as a right angle. Logan said it is an acute angle. Who is correct?
- Logan is correct. This is an acute angle.
- Caleb is correct. This is a right angle.
- Neither Logan nor Caleb is correct. It is an obtuse angle.
Try again. Does this angle measure less than a square corner or exactly a square corner?
Nice work! This angle forms a square corner, or a 90-degree angle.
Try again. Does this angle measure exactly 90 degrees or more than 90 degrees?
Madelyn sees this shape and counts the angles. How might she describe the angles in this shape?
- This shape has two right angles and two acute angles.
- This shape has two obtuse angles and two right angles.
- This shape has two obtuse angles at the top, and two acute angles on the bottom.
- This shape has an obtuse angle, a right angle, and two acute angles.
Try again. Remember to compare the angles to a square corner.
Try again. Remember to compare the angles to a square corner.
You got it! There are two angles that measure more than a square corner, and two angles that measure less than a square corner.
Try again. Remember to compare each angle to a square corner.
Choose the shape that has only acute angles.
Correct! All three of these angles measure less than a right angle.
Try again. This shape has 5 angles that measure more than 90 degrees.
Try again. This shape has four angles that measure exactly 90 degrees.
Try again. This shape has no angles.
All of these shapes have the same type of angles. What kind of angles do they share?
- These shapes have all acute angles.
- These shapes all have right angles.
- These shapes all have obtuse angles.
Try again. Remember, acute angles measure less than 90 degrees, or less than a square corner.
Try again. Remember that right angles measure 90 degrees.
Nice comparing! All of the angles are greater than 90 degrees.
Which of these shapes have right angles? Select all that apply.
Try again. Remember, right angles measure 90 degrees and have a square corner. These angles are greater and less than 90 degrees.
Good job! The bottom angles of the arrow are both right angles, and measure 90 degrees.
Good job! The corner angles of the arrow are all right angles, and measure 90 degrees.
All of these shapes have right angles in them. Which shape below also has right angles in it?
Try again. This shape has all acute angles.
Sorry! This has an acute angle. Find a shape with a square corner.
Try again. This shape has acute and obtuse angles.
Super! This shape has at least one right angle!
Summary
Questions answered correctly:
Questions answered incorrectly: