Please answer this in two minutes

x = 144 degrees

We know there are 10 sides on this polygon, and we know the sum of interior angles in a regular polygon is represented as 180*(s-2) where s is the number of sides.

With this, we know that the sum of interior angles on a 10-sided regular polygon is 180*(10-2)=1440.

We also know that the measure of angle x = the measure of any other interior angle in the 10-sided polygon.

Using substitution, we know that 10x = 1440 degrees so x = 144 degrees.

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc