Question

ABCD is a quadrilateral in which ab is parallel to CD and AD is equal to BC is equal 5 cm if a is equal to 105 degree find the value of B​

Answer 1

Answer:

it is a parallelogram as its opposite sides are equal and parallel

Step-by-step explanation:

finding angle b

properties of parallelograms :

vertically opposite angles are equal and A and B forms Co interior angles and thus their sum is 180 degrees.

angle A is vertically opposite to angle C= 105

Now A and B forms Co interior angles so their sum is equal to 180 degrees

105 degrees +angle b=180 degrees

angle B=180-105 degrees

angle B=75 degrees

hope it helps you