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What is true about every rotation?

The image is smaller than the pre-image.

The image and pre-image are congruent.

The image is larger than the pre-image.

The image overlaps the pre-image.

 Sep 3, 2020
 #1
avatar+166 
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Hello, we are given 4 facts, all of which we know must be true. 

 

 

Part 1: The image is smaller than the pre image. This tells us that we are decreasing the size as we rotate.

Part 2: Cannot be true if the first one is true. 

Part 3: This indicates that the image is rather being increased in size.

Part 4: Must be true if part 3 and 2 are true. 

 

This means that 1 is the only one that can be true. Please correct me if I am misunderstanding this question.

 Sep 3, 2020
 #2
avatar+110835 
+1

Hi Narcirema,

You have misunderstood the question.

 

Three of the choices are wrong.

Only one is true every time.  

Which one is it.

 

If the asker knows what a rotation is, and understands what congruent means, then they can answer themselves.

 

eg. Think about the hand of a clock as it rotates.  

Which of those statements are nonsense and which must be true all the time?

Melody  Sep 3, 2020

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