Singapore 3B and Angles

[Karenciavo]

I didn't get the HIG for this level (forgot to order then didn't want to pay shipping :001_rolleyes:) so maybe I'm missing something. I don't like the way the text alone teaches angles so I wound up teaching my son way beyond what they were calling for (I'm guessing opposing and adjacent angles are beyond :tongue_smilie:) So, anyway, do they simply want students to eye ball the angle?

Thanks,

Karen

[Karenciavo]

:bigear:

[Crimson Wife]

I had to turn in my 3B HIG when we switched virtual charter schools last June but I remember having my DD measure the angles with a protractor and labeling them acute, right, obtuse, or reflex.

[rootsnwings]

I haven't seen 3B but we just finished angles in 4A and I think they want them to just be able to realize the full 360* of a circle concept. They want them to be able to look at an acute angle and realize it has to be between 0-90*, etc... they just want them to practice picturing this in their head, I think... which I find value in because my ds, having never used a protractor before a month ago, had some issues being able to comprehend what he was supposed to be doing... I think if he had just been prompted to think about the concept in the past, he would've had an easier time using & understanding the protractor this time around.

 

HTH! :)

[Karenciavo]

Thanks :001_smile: We used a protractor too, some of the angles were hard to eye ball I thought, there was at least one 100º angle. We start 4A next week, thankfully I have the HIG, I missed it.

[Annic]

All you have to do is use the corner of an index card. Fit it in the angle and see if it is smaller or larger. That is why they have them make a right angle by folding the paper. Partly to see that it is a fourth of a circle. But folding a paper can be a little off if not lined up. So use the corner of an index card. No need for a protractor. This is in the HIG.

[Karenciavo]

Thank you Annic!