ABCD is a rhombus with angle ABC =40. The measure of angle ACD is what?

90, 20, 40 or 70.

Hi Parul!
Here is the answer to your query.
 
The given information is represented diagrammatically as
 
 
ABCD is a rhombus
∴∠ABC + ∠BCD = 180°
⇒∠BCD = 180° – 40° = 140°
AC is the diagram of rhombus ABCD
∴ ∠ACD = (½)∠BCD = (½) × 140° = 70° .
 
The measure of the angle ACD is 70°
 
Hope! You got the answer.
Cheers!!!

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thanx

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