Lesson

Do you remember what a measure of turn is?

Use this applet to help you explore different measures of turns.

Based on the circle above, a quarter turn indicates a 90\degree degrees, a half turn indicates a 180\degree degrees, and a full turn of circle indicates a 360\degree degrees.

A right angle is a:

A

Quarter turn

B

Half turn

Worked Solution

Idea summary

A right angle is a quarter turn around a circle.

Let's look at slides first, where we change the position of a shape. Slides are also called translations.

Choose the picture that shows a translation.

A

B

C

Worked Solution

Idea summary

A slide or translation is when the object moved along a straight line.

Now let's look at flips in this video. Flips are also called reflections.

Choose the picture that shows a reflection.

A

B

C

Worked Solution

Idea summary

A flip or reflection is when the object is flipped or reflected across a line, and the result is a mirror image.

Now let's learn about turns, which change the orientation of a shape or object. Turns are also called rotations.

Choose the picture that shows a rotation.

A

B

C

Worked Solution

Idea summary

Translations, reflections and rotations change the position or orientation of the shape, but the shape itself stays the same.

Describe translations, reflections and rotations of two-dimensional shapes. Identify line and rotational symmetries