Use the composition (^R1r(-90,C)(ABD=DEF, shown below. Which angle has an equal measure to m

Question

Use the composition (^R1r(-90,C)(ABD=DEF, shown below. Which angle has an equal measure to m<B?

anonymous · Answer

A) m<D B) m<A C) m<F

anonymous · Answer

Please someone help me with this!

anonymous · Answer

i'm not familiar with this notation:  (^R1r(-90,C)(ABD=DEF

can you explain??

anonymous · Answer

I don`t really understand it, that's why I need help. :/ That's just what the question asked

anonymous · Answer

it looks like it's a topic in geometric transformations ?? is that what ur studying?

anonymous · Answer

yeah that would be it which I don`t understand at all but I think it is C because that is the only one that seems to make sense

anonymous · Answer

if i had to make a guess, yes that would be it...
a 90 degree rotation with C as the rotation point, then reflected over line l.  the image of B would be F.

anonymous · Answer

Thanks so much! I`m struggling big time with my geometry!

anonymous · Answer

no problem.... that's why ur here... :)
i suggest u read that text so you can be familiar with the transformation notations...
then you can tell me what they mean... ;)

lilkim089 · Answer

hi brittanyy. im in geometry part2 and stuck. do you think u can help me