8. A plane flew 1,740 km in 6 hours with a tail wind. On the return trip, going into the wind, the
plane flew 570 km in 3 hours. What is the plane's speed if there was no wind? What is the
speed of the wind? Write the system of equations that would be used to solve this problem.

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

the answer is d

step-by-step explanation: