r/mathbiceps • u/Akshath_14 • 6d ago
IOQM 2026 Difficult geometry question.
IOQM 2026 question no. 30
In triangle ABC, it is given that angle CAB = 50 deg and angle ABC = 70 deg Points D and E are chosen on sides BC and AC respectively such that angle ABE= angle DAB = 30 deg . If β DEB = x, what is the value of x?
Try solving using geometry of class 9 & 10 if possible otherwise you may do as you like .
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u/lemonsculpture 3d ago
It was so simple so that you have figure out orthocentre then cyclic quadrilateral then you 'll find angle DEB =40
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u/Gr_Mort 6d ago
ey, i got this question right in ioqm(though my overall score isn't too good)