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Description:
Given that m∠3 = 80°, what is m∠2 + m∠7 + m∠4 + m∠6?
Transcript
- 00:03
Okay people check out this weird war laki looking and
- 00:07
diagram here We got one through seven and angles there
- 00:10
are question given that well the angle em there Ah
- 00:14
number three Right here is eighty degrees What is angled
- 00:18
to Plus angle seven plus angle Four plus angle six
Full Transcript
- 00:26
All right well let's start out by saying what equations
- 00:28
we can write that use the angles in the given
- 00:31
some and bear with us This isn't simply a neat
- 00:34
thought experiment There's a point to it way Swear well
- 00:37
the sum of any triangle's interior angles one hundred eighty
- 00:39
degrees So seven plus three plus six there is one
- 00:42
hundred eighty degrees right That's at least a foundational base
- 00:46
we can work with Used this equation Isolate angle six
- 00:49
and seven and apply the fact that the angle three
- 00:52
is eighty degrees So if we do that we get
- 00:55
well Angle seven and six are one eighty Then we
- 00:58
take one eighty and subtract that angle Three there and
- 01:01
that gets us a hundred degrees So angle's too three
- 01:04
and four form a linear triplet so angle two three
- 01:08
and four are one hundred eighty degrees Well we can
- 01:10
isolate angles two and four and use the measure of
- 01:13
angle three once again right So we have angle too
- 01:16
And for our one hundred eighty degrees Then subtract ingle
- 01:18
three's eighty and that gets us a hundred degrees Well
- 01:21
knowing that angle to plus angle Seven plus angle Four
- 01:24
plus angle Six is basically just one hundred plus one
- 01:27
hundred or two hundred degrees in angularity So the answer 00:01:31.521 --> [endTime] they arrest you See that's it Two hundred baby
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