Question

in parallelogram ABCD angle A is (6y+5) and angle B is (10y-1) . Determine the measure of angle C

Answer 1

opposite angles of paralellogram are equal

so <A=<C=6y+5

<B=<D=10y-1

sum of angles = 360

2(6y+5)+2(10y-1)=360

12y+10+20y-2=360

32y+8=360

32y=352

y=11

<A=<C=6y+5=71°

<B=<D=10y-1=109°