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Mathematics 8 Online
OpenStudy (anonymous):

Help? New question for GEOMETRY Sarla made a drawing of a geometric figure for a fabric print. The figure was a quadrilateral with a pair of angles measuring 60° each. If the figure she drew is a concave polygon, which of these could be the measures of the other two angles? 45°, 235° 15°, 225° 110°, 130° 140°, 110°

OpenStudy (anonymous):

convex - all angles less than 180 sum of angles?

OpenStudy (anonymous):

what?

OpenStudy (anonymous):

360-sum of angles

OpenStudy (anonymous):

i do you get the sum of angles?

OpenStudy (anonymous):

de answer is 110 nd 130

OpenStudy (anonymous):

thanks

OpenStudy (anonymous):

:).. nytime

OpenStudy (anonymous):

hey wait did u say concave?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

den de ans wud b 15 nd 225

OpenStudy (anonymous):

concav will hav an internal angle gr8r dan 180

OpenStudy (jiteshmeghwal9):

let the two unknown angles be 'x' & 'y'. then the equation will be 360-(x+y)

OpenStudy (anonymous):

@jiteshmeghwal9 ...bt der wud b two ans if v do it lyk de way u said...notice de pint dat de figure is concave...so e ans is 225 nd 15

OpenStudy (jiteshmeghwal9):

but u don't know that the angles are equal or nt

OpenStudy (anonymous):

itz given dat de figure is quadrilateral which means de sum of de angle measures is 360 agreed?

OpenStudy (anonymous):

den as de figure is concave, one of de internal anglz should b gr8r dan 180....so only 2 choices r left, eithr 45°, 235° or15°, 225° ...nd if v add all anglez up (givn two angles r 60 each) v get 360 only fr 15+225+60+60...de odrz wud exceed 360

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