The graph shown represents part of sheri's trip to her sister's house. during what part of her trip was the car's speed decreasing? a) between 0 and 20 minutes b) between 20 and 40 minutes c) between 40 and 50 minutes d) between 60 and 80 minutes

The answer is C since it's the part on the graph where the line goes down.

cheater

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