Question

2. an a quadrilateral ABCD, the measure
of the three angles A, B and C of
the quadrilateral are 110 70 and
80 respectively. Find the measure
of the third angle.​

Answer 1

Answer:

100 degrees

Step-by-step explanation:

You can use the method called - Angle Sum Property of a Quadrilateral

Here,

Angle A + B + C + D = 360 degrees

110 + 70 + 80 + D = 360

260 + D = 360

D = 360 - 260

   = 100 degrees