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Mathematics 18 Online
OpenStudy (anonymous):

In the figure above, AB=AC and the sides of triangle ABC are tangent to circle O, at points D,E, and F. if measure of angle A=30 degrees, what is measure of angle DOE?

OpenStudy (anonymous):

figure?

OpenStudy (anonymous):

|dw:1348417567239:dw|

OpenStudy (anonymous):

circle is inside

OpenStudy (anonymous):

tips?

OpenStudy (phi):

quadrilateral angles add up to 360

OpenStudy (anonymous):

tip wud be that line from the centre of the circle..is perpendicular to side of the triangle then do as phi said :)

OpenStudy (anonymous):

k...

OpenStudy (anonymous):

wait

OpenStudy (anonymous):

so

OpenStudy (anonymous):

ehh

OpenStudy (anonymous):

D=90 degrees

OpenStudy (anonymous):

E=90 degrees

OpenStudy (anonymous):

right?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

so it makes a quad.

OpenStudy (anonymous):

I did not see that

OpenStudy (anonymous):

avoid saying D= ...use proper notation

OpenStudy (anonymous):

75+90+90+105=360

OpenStudy (anonymous):

sorry

OpenStudy (anonymous):

30+90+90+x=360

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