What is the missing angle of a quadrilateral if the other three angles are: 40º, 100º and 120º?

100

Step-by-step explanation:

100°

Step-by-step explanation:

Angles in a quadrilateral add up to equal 360

That being said we can calculate the measure of the missing angle by subtracting the measures of the known angles from 360

So missing angle = 360 - 120 - 100 - 40

360 - 120 - 100 - 40 = 100

Hence, the measure of the missing angle is 100°

square

step-by-step explanation:

what is a pre-existing condition claus?

means if you're already damaged some way when you take out a medical insurance you will not get full compensation for that injury that you already have.