During a sale, for each shirt that mark purchased at the regular price, he also purchased a shirt at half the regular price. how many shirts did mark purchase during the sale?
a) the regular price of each of the shirts that mark purchased during the sale was $21.50.
b) the total of the prices for all the shirts that mark purchased during the sale was $129.00.

idek

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

7,24

step-by-step explanation: