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In a parallelogram <A:<B=1:2 then<B=​

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Answer:

Let ∠A be x and ∠B be 2x

As we know, that opposite angles are equal in a parallelogram.

Hence,

∠A=∠C and ∠B=∠D

and also ,  

sum of all angles  = 360  

Hence,  

∠A+∠B+∠C+∠D=360  

2(∠A+∠B)=360  

⇒(x+2x)=180  

⇒3x=180  

∴x=60  

∴2x=120

∴ <B=120

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