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#1 2013-07-15 03:25:47

cooljackiec
Full Member

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transformations

OPQRSTUVWX is a regular decagon. A rotation of

degrees about U maps X to R. Given
, find


Two lines
and m intersect at O at an angle of
. Let A be a point inside the acute angle formed by
and m. Let B and C be the reflections of A in lines
and m, respectively. Find the number of degrees in
.

Equilateral triangle ABC has centroid G. Triangle A'B'C' is the image of triangle ABC upon a dilation with center G and scale factor -2/3. Let K be the area of the region that is within both triangles. Find K/[ABC].


I see you have graph paper.
You must be plotting something
lol

#2 2013-07-17 02:47:06

cooljackiec
Full Member

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Re: transformations

are there any hints or solutions here??


I see you have graph paper.
You must be plotting something
lol

#3 2013-07-17 03:47:41

anonimnystefy
Real Member

Offline

Re: transformations

72 degrees is the answer for the first one.


The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

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