5 Measuring reflex angles

5 Measuring reflex angles

5 Measuring reflex angles

KSAMathematics · ⏱ 1:54 · 314.6K مشاهدة · 13 years ago

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Here we are measuring reflex angles. Well done if you've got this far. I've got couple of ways to do this. It's the outside angle here that we're measuring. One way is to measure is to draw an extra line here just to carry on that line. Then measure the angle underneath here which is 0 10 50 60 64° and then add that on to 180. You see what 180 there we've got 64 there. So alto together that's 180 + 64 which is 244. So the angle that we are measuring is 244°. The other way to do it is to measure this angle here, the obtuse angle. And we know that angles around point add up to 360. So if work out this angle which is okay then can do 100 360 take away 116 and what do you get 244 so this is 244 and for this angle I'll do it that way round I'll measure the acute angle on the inside which is 30. What do you reckon? 33°. 33°. So to work out the reflex angle, I'll do take away 33, which is 327. So this angle here is 327°. All right. Thanks very much for watching. Bye.

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