Question

ABCD is a rhombus such that angleACB=40.What will be angleADB​

Answer 1

in rhombus ABCD,

angle ACB = angle CAD = 40. (. alt int. angle )

now,

angle AOD = 90 ( diagonal of rhombus bisect each other at 90 degree)

so, in triangle AOD ,

angle COD + angle AOD +angle ODA = 180

40 + 90 + ADB = 180

ADB = 180 - 130= 50

so, this is your answer

Answer 2

the angle ADB is 40 because all angles are equal in rhombus

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