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Mathematics 13 Online
OpenStudy (anonymous):

In the rhombus, Angle 1 = 140. What are Angles 2 and 3? The diagram is not to scale. B. Angle 2 = 40 and Angle 3 = 20 C. Angle 2 = 40 and Angle 3 = 70 D. Angle 2 = 140 and Angle 3 = 20 I thought 2 and 3 would be 140, and 70, but I was wrong.

OpenStudy (anonymous):

OpenStudy (mokeira):

in a parallelogram ... opposite angles are congruent

OpenStudy (mokeira):

∴m∠2=m∠1=140deg

OpenStudy (mokeira):

then look @ the lower half as an isosceles triangle

OpenStudy (mokeira):

hope you understand

OpenStudy (mokeira):

|dw:1407785638746:dw|

OpenStudy (anonymous):

Oh okay, so being that 1 and 2 are the same angle it would be 40 on 3 and 4, then half of that would be 20. So than d. would be the answer.Thank you!

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