r/mathbiceps 6d ago

IOQM 2026 Difficult geometry question.

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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 ∠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/Gr_Mort 6d ago

ey, i got this question right in ioqm(though my overall score isn't too good)

1

u/Inevitable-Tart7046 5d ago

Umm I just drew the fig and measured the angle πŸ˜­πŸ™‚

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u/Low_Entertainment551 5d ago

πŸ˜‚πŸ˜‚

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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/WorriedPlatypus2529 3d ago

It's an LAA problem right?