Question

in the given figure ABllDC and DC =bc. if ad ll ce and angle a =70° find all the angles of trapezium ABCD ​

Answer 1

Answer:

Given: Three angles of a quadrilateral are 75°, 90° and 75°.

Let the fourth angle be x.

Using angle sum property of quadrilateral,

75°+90°+75°+x=360°⇒240°+x=360°

⇒x=360°-240°⇒x=120°

So, the measure of  the fourth angle is 120°.