4th Grade Math

[RLB]

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You have redrawn the angles and labeled them to fit your theory.

[TexMax]

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BD is not part of the angle ABC. What's the shared ray.

[tigerscowboy]

3.14

;o)

[StrayDog]

You have redrawn the angles and labeled them to fit your theory.

[ATTACH]787409[/ATTACH]

Math isn't a theory - your pictures doesn't show angle ABC

[RLB]

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Correct.

You are given two parts of the equation..... 40° ABC and 23° CBD they "share" 17° of ABD.

[RLB]

Math isn't a theory - your pictures doesn't show angle ABC

The problem tells you it's 40.....

[StrayDog]

You have redrawn the angles and labeled them to fit your theory.

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Nope you drew angle CAB - different problem

[Gunnyart]

African or European Swallow?

[cehorn]

I think the controversy is whether the original drawing is the teachers or the students answering the question. If it is the teacher's then the answer is 17. if there was no drawing and only the wording of the question then Straydog and RS3 are correct. Just reading the words and not looking at the picture, my answer is 63.

[StrayDog]

I think the controversy is whether the original drawing is the teachers or the students answering the question. If it is the teacher's then the answer is 17. if there was no drawing and only the wording of the question then Straydog and RS3 are correct. Just reading the words and not looking at the picture, my answer is 63.

Ding, ding, ding!

My point is when you give an angular measurement it is relative to some reference frame. (i.e. Vertical line, and + angles are counter clockwise)

If a reference frame isn't established there are multiple solutions.

[mikemorvan]

I think the controversy is whether the original drawing is the teachers or the students answering the question. If it is the teacher's then the answer is 17. if there was no drawing and only the wording of the question then Straydog and RS3 are correct. Just reading the words and not looking at the picture, my answer is 63.

What he says.

Drawn to this thread like a moth to a flame.

[TexMax]

BD is not part of the angle ABC. What's the shared ray.

Nm. BC. Making my head hurt i tap out

[Cazador]

****, I'm glad I'm not in 4th grade!

[RLB]

Nope you drew angle CAB - different problem

ABC and CAB are the same thing....as is DBC and CBD. C and A are the common rays.....we are given that in the equation and we are given D.

The little right angle symbol they are showing you in the problem assumes it's a right angle and is based off 90°.....so we know ABC is 40 and DBC is 23....if ABD + DBC = ABC, it's safe to assume that ABC (40) - CBD (23) = ABD (17)....basing it off of a right angle.

Now I have a headache......

[BuckySWT]

Better question is this:

Based on child development research, is this math even developmentally appropriate for a 9-10 year old child?

I ask that because 2 years ago, this was a 6th grade TEK, now it's 4th grade.