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3) Reflexive Property

4) SAS

Step-by-step explanation:

1. The Reflexive Property states that: a quantity is congruent (equal) to itself.

1. SAS theorem states that: two triangles are equal if two sides and the angle between those two sides are equal.

2. Because it is given that RS ≅ UT and RT ≅ US, and it includes the same 2 lines being equal as given/said, RST ≅ UTS because of SAS (theorem).

the height of the surface increases from the center out to the sides of the road

it is c!

a reflection across the x axis and a 90 degree rotation left and right.