Question

In a quadrilateral ABCD sides AB= BC= CD and angle C=150° , angle B=90° then find angle D?​

Answer 1

Answer:

60 degree

Step-by-step explanation:

given:- AB=BC=CD

and C=150 degree

angle B=90degree

Find:-angle D is =?

Now,

let angle D be x

and also Angle A be x

we know that,

the sum of quadrilateral is =360

<A+<B+<C+<D=360

=>X+90+150+X=360

=>2x+240=360

=>2x=360-240

=>2x=120

=>x=120/2

=>x =60°

Hence,<A=60°,<B=90°,<C=150°and <D=60

hope this will be helpful for you