A parallelogram is dilated by a scale factor of three.

Which of the following properties are unchanged?

I. the perimeter and area
II. the measure of the angles
III. the lengths of the sides

II
II and III
I and III
I and II

Question

A parallelogram is dilated by a scale factor of three.

Which of the following properties are unchanged?

I.	 	the perimeter and area
II.	 	the measure of the angles
III.	 	the lengths of the sides

    II
    II and III
    I and III
    I and II

anonymous · Answer

I'm going with "I and II" but I'm not so sure

anonymous · Answer

Can you please help me? I'll medal.. :)

austinl · Answer

What does dilated mean?

anonymous · Answer

Dilated means the enlargement or reduction of an image.

anonymous · Answer

You also use scale factor when finding a dilation.

anonymous · Answer

does that sound familiar?

austinl · Answer

|dw:1392411588942:dw|

austinl · Answer

|dw:1392411601617:dw|
The black lines are examples of dilations. What can you say about the different portions of the shape?

anonymous · Answer

The size of the rectangle is increasing and decreasing

austinl · Answer

Correct, so what does this mean about the area, the side length, perimeter, and angles?

anonymous · Answer

the perimeter and angles stay the same. is that right?

austinl · Answer

If each side were to get larger or smaller, would that affect the perimeter?

anonymous · Answer

My bad I meant the angles would stay the same :)

anonymous · Answer

so then answer is "II" ?

austinl · Answer

That is what I would say :)

anonymous · Answer

Thank you so much for helping me :)

austinl · Answer

No problem! Glad to help!