Math Is Fun Forum

rogerwaters

Member

Registered: 2013-11-02

Posts: 85

Transformations

Hi, I need help with this transformation lesson. I'll post 5 at a time.

1. An angle changes in size as it undergoes a dilation.
A False
B True

2. A line segment usually decreases in size under contraction.
A False
B True

3. There can only be one obtuse angle in a triangle.
A False
B True

4. If a figure is reflected across the x-axis it is congruent to the original figure.
A False
B True

5. A figure derived from a previous figure by rotation, translation or dilation will be congruent to the original figure.
A False
B True

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I think there are things in my story that have helped my creativity. Your father being killed, for instance, is one of the best things that could happen to a kid if he's going to write poetry or songs.
-Roger Waters

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Transformations

Hi;

1) A

2) I would say B.

3) B

4) B

5) A

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Lpravia020614

Member

Registered: 2015-11-03

Posts: 35

Re: Transformations

Hi;

I am working on the same thing and its asking for reasons as to why these are True or False.
can someone please help. I got the answers stating true or false but I cannot figure out why.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Transformations

Hi;

Which questions?

I am working on the same thing

Please show your workings.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,143

Re: Transformations

hi Lpravia020614

Welcome to the forum.

Have a look here:

http://www.mathsisfun.com/geometry/transformations.html

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob