What is the measure of the missing angle?

Therefore the measure of the missing angle x, is 90°.

Step-by-step explanation:

Let name the vertices of a Quadrilateral as ABCD such that

∠A = 107°

∠B = 72°

∠C = 91°

∠D = x

To Find:

x = ?

Solution:

In a quadrilateral,

Sum of the measures of all the angles is add up to 360°

Substituting the values we get

Therefore the measure of the missing angle x, is 90°.

i believe

step-by-step explanation:

from my conclusion c

tangent

step-by-step explanation: