Question

If three angles of a quadrilateral measure 110°,30° and 80°, then find the measure of the
fourth angle.​

Answer 1

Angle sum property of a quadrilateral states that the sum of all angles of the quadrilateral =360*

So let the 4th angle be =x

110+30+80+x=360

220+x=360

x=360-220

x=140*--Answer

Answer 2

Answer:

Your answer is ∠D = 140°

Step-by-step explanation:

We know that sum of four angles in a quadrilateral be 360 degree

They given that:

angle A : 110°

angle B : 30°

angle C : 80°

angle D : ?

To find :

angle D

solution:

∠A + ∠B + ∠C + ∠D = 360°

= 110° + 30° + 80° + ∠D = 360°

= 220° + ∠D = 360°

= ∠D = 360° - 220°

= ∠D = 140°

Your answer is ∠D = 140°

hope this helps u

please mark this as the brainliest.

Diagram given below

Attachments: