The double reflections around intersecting lines are a little tricky to count until you actually do a few. Simply reflect a point over each line and I think you will see the "summative" rotation formed... try intersecting lines with apprx 20˚,40˚,60˚ and I think you'll get a feel for it.
I'm at math parties til very late tonight (Pi-day eve is a crazy night for us math teachers!), so work together and get it straight.
What do you mean by 20˚,40˚,60˚? How would we do the 20 and 40 without using a protractor (SORRY FOR USING THE WORD!!)? I only know how to do 60 (equilateral triangle) and multiples of 90...
The little dot in the rule of a transformation means "follows", right? So if it was Blah ˚ Bleh, you would transform the figure with Bleh and then Blah?
Otherwise no questions on the Mid-Chapter Quiz. :)
I was just approximating (you can use a p-thinger if you want to)... I won't ask you to reproduce an exact transformation... you could "free-hand" draw intersecting lines at various (estimated) angles and see what happens when you "composite-reflect" a point over them... or you could try geogebra!
The double reflections around intersecting lines are a little tricky to count until you actually do a few. Simply reflect a point over each line and I think you will see the "summative" rotation formed... try intersecting lines with apprx 20˚,40˚,60˚ and I think you'll get a feel for it.
ReplyDeleteI'm at math parties til very late tonight (Pi-day eve is a crazy night for us math teachers!), so work together and get it straight.
What do you mean by 20˚,40˚,60˚? How would we do the 20 and 40 without using a protractor (SORRY FOR USING THE WORD!!)? I only know how to do 60 (equilateral triangle) and multiples of 90...
DeleteBibles?? (Crossing fingers)
ReplyDeleteThe little dot in the rule of a transformation means "follows", right? So if it was Blah ˚ Bleh, you would transform the figure with Bleh and then Blah?
ReplyDeleteOtherwise no questions on the Mid-Chapter Quiz. :)
I was just approximating (you can use a p-thinger if you want to)... I won't ask you to reproduce an exact transformation... you could "free-hand" draw intersecting lines at various (estimated) angles and see what happens when you "composite-reflect" a point over them... or you could try geogebra!
ReplyDeleteI am really confused on reflecting figures across intersecting lines :(
ReplyDeleteWhat do we need to know
Deletecan u update the online grade soon. i really wanna know what i got
ReplyDeleteARGH!
ReplyDelete