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.
How many lines of symmetry does a rectangle have?
- 0
- 1
- 2
- 4
Sorry, that is not right! A rectangle does have line symmetry.
Sorry, that is not right! A rectangle has more than 1 line of symmetry.
That’s right! A rectangle has 2 lines of symmetry, horizontally and vertically across the middle.
Sorry, that is not right! A rectangle does not have diagonal lines of symmetry.
How many lines of symmetry does this shape have?
- 0
- 1
- 2
- 4
Sorry, that is not right! This shape has equal sides and equal angles, so it will have line symmetry.
Sorry, that is not right! This shape has more than 1 line of symmetry.
Sorry, that is not right! This shape has more than 2 lines of symmetry. Remember to also try diagonal lines of symmetry.
That’s right! A square has 4 lines of symmetry, a vertical line, a horizontal line, and 2 diagonal lines.
How do you know if a shape is symmetrical?
- A shape is symmetrical if it has 4 sides.
- A shape is symmetrical if the shape has opposite sides that are parallel.
- A shape is symmetrical if you can fold it, and both sides are identical.
- A shape is symmetrical if it has an even number of sides.
Sorry, that is not right! Some parallelograms and trapezoids have 4 sides but are not symmetrical.
Sorry, that is not right! A parallelogram has opposites sides that are parallel, but it is not symmetrical.
That's right! Symmetrical shapes have 2 identical sides.
Sorry, that is not right! An equilateral triangle has an odd number of sides, but it is symmetrical.
Which origami animal has line symmetry?
Sorry, that is not right! There is no way to fold this flamingo so that both sides are identical.
Sorry, that is not right! The kangaroo cannot be folded so that both sides are identical.
Sorry, that is not right! The face of the fox is symmetrical, but not the entire fox.
That’s right! The dog’s face can be folded in half so that both sides are identical.
Which shape has an infinite number of lines of symmetry?
- circle
- square
- octagon
- pentagon
That’s right! A circle has an infinite number of lines of symmetry.
Sorry, that is not right! A square has 4 lines of symmetry.
Sorry, that is not right! A regular octagon has 8 lines of symmetry.
Sorry, that is not right! A regular pentagon has 5 lines of symmetry.
If Zoe and Logan made an aisle using line symmetry from the top of the rectangle to the bottom of the rectangle of chairs, how many chairs would be on each side?
- 15 chairs
- 16 chairs
- 20 chairs
- 25 chairs
Sorry, that is not right! That would put 15 chairs on one side and 25 chairs on the other side. There needs to be the same number of chairs on each side.
Sorry, that is not right! If the middle row of chairs were removed, then there would be 16 chairs on the top and the bottom, but Zoe and Logan don’t want to remove any chairs.
That’s right! There would 20 chairs on each side.
Sorry, that is not right! That would put 25 chairs on one side and 15 chairs on the other side. There needs to be the same number of chairs on each side.
Which real-world object does NOT have a line of symmetry?
Sorry, that is not right! A stop sign is shaped like an octagon, which has 8 lines of symmetry.
Sorry, that is not right! A road cone has a vertical line of symmetry.
Sorry, that is not right! This flower has 6 lines of symmetry.
That's right! The door does not have any lines of symmetry. The top and bottom of the door, the doorknob, and the rectangle and square on the door, make it so the door cannot have line symmetry.
Which shape has 2 lines of symmetry?
- isosceles triangle
- rhombus
- square
- trapezoid
Sorry, that is not right! An isosceles triangle has only 1 line of symmetry.
That’s right! A rhombus can have 2 lines of symmetry, a vertical line and horizontal line.
Sorry, that is not right! A square has 4 lines of symmetry.
Sorry, that is not right! A trapezoid can have, at most, 1 line of symmetry.
Is the American flag symmetrical?
- Yes. The American flag is shaped like a rectangle, which has 2 lines of symmetry.
- Yes. The American flag will have the same number of stripes on the top and bottom if you fold the top down to the bottom.
- No. The American flag is not symmetrical because one corner of the flag has stars, making it impossible to fold the flag so that both sides are identical.
- No. The American flag is not symmetrical because it has opposite sides that are parallel.
Sorry, that’s not right! The flag is shaped like a rectangle, but the stars and stripes do not allow the flag to have line symmetry.
Sorry, that is not right! When you fold the top to the bottom, the top will have the stars, but the bottom will not.
That’s right! The design on the American flag makes it so you cannot fold the flag into 2 identical sides.
Sorry, that is not right! The American flag does have opposite sides that are parallel, but it is the design on the flag that doesn’t allow the flag to be symmetrical.
Which shape has the MOST lines of symmetry?
- pentagon
- scalene triangle
- trapezoid
- square
That’s right! A regular pentagon has 5 lines of symmetry, which is more than the other shapes.
Sorry, that is not right! A scalene triangle does not have any lines of symmetry.
Sorry, that is not right! A trapezoid can have only 1 line of symmetry, at most.
Sorry, that is not right! A square has 4 lines of symmetry, but another shape has more.
Summary
Questions answered correctly:
Questions answered incorrectly: