Question

three angles of quadrilateral are 79°, 76° ,91° respectively. Find the fourth angle​

Answer 1

Answer:

360-(79+76+91)=114°

hope this helps you

Answer 2

Given:

The three angles of a quadrilateral

∠1 = 79°

∠2 = 76°

∠3 = 91°

To Find:

The fourth angle of the quadrilateral.

Solution:

A quadrilateral is a polygon having four sides and four vertices.

The total sum of all the internal angles of a polygon = 360°

So, ∠1 + ∠2 + ∠3 + ∠4 = 360°

Putting the given values of angles in above equation.

⇒ 79° + 76° + 91° + ∠4 = 360°

⇒ ∠4 = 360° - ( 79° + 76° + 91°)

⇒ ∠4 = 360° - 246°

⇒ ∠4 = 114°

Hence, the fourth angle of the quadrilateral is equal to 114°.