Question

Find the measure of the fourth angle if the dimensions of the three angles of a quadrilateral are 80 °, 90 ° and 130 respectively?​

Answer 1

Answer:

We know that the sum of all angles of a parallelogram is 360°.

Let x be the unknown angle,

⇒x+70°+95°+105°=360°

∴x=90°.

Hence, the answer is 90°.