in parallelogram ABCD, <A=3 times <B. Find all thw angles of the parallelogram. In the same parallelogram, IG AB=5x-7 and CD=3x+1; find the length of CD
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mrpiyush1:
i found out the solution
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<A+<B =180,. adjacent angles of parallelogram
<A=3<B hence,3<B+<B= 180
<B=180/4=45
<A=180-45=135
also AB=CD
5x-7=3x+1,. 5x-3x=1+7,. 2x=8,. x=8/2=4
hence, CD=3*4+1=13
<A=3<B hence,3<B+<B= 180
<B=180/4=45
<A=180-45=135
also AB=CD
5x-7=3x+1,. 5x-3x=1+7,. 2x=8,. x=8/2=4
hence, CD=3*4+1=13
exactly
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