In the figure below, angle y and angle x form vertical angles. angle y forms a straight line with the 80° angle and the 60° angle.
a straight line is shown and is marked with three angles. the first angle measures 80 degrees. the second angle measures 60 degrees. the third angle is labeled y. the line between the 60 degree angle and angle y extends below the straight line. the angle formed is labeled angle x.
write and solve an equation to determine the measure of angle x.

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

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