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Mathematics 11 Online
OpenStudy (anonymous):

In the diagram, if m∠D = 70 degrees find m∠F. A)35 degrees B)70 degrees C)110 degrees D)140 degrees

OpenStudy (anonymous):

OpenStudy (asnaseer):

DEFG is a cyclic quadrilateral, so sum of angles D and F must be 180.

OpenStudy (anonymous):

180 isnt an answer choice

OpenStudy (asnaseer):

I didn't say 180 is the answer - I said "sum of D and F must be 180"

OpenStudy (anonymous):

soo the answer is . . .

OpenStudy (asnaseer):

surely you can work that out now? you are given D=70 and I just showed you that: D+F=180 so F=...

OpenStudy (anonymous):

110 ?

OpenStudy (asnaseer):

well done - correct

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