Determine whether each of the following relations is an equivalence relation, an order relation, or neither. If it is an order, determine whether it is strict and whether it is partial or total. The universe is the set of positive integers.

a. {hx, yi : y is a multiple of x}
b. {hx, yi : the greatest common factor of x and y is 5}
c. {hx, yi : x and y have the same number of prime factors}
d. {hx, yi : when written in base 10, x has at least as many digits than y}

you answer is a

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