Please look at picture

As follows,

Step-by-step explanation:

1.ST=RN (Given)

2.ST=SI+IT (Given)

 .RN=RU+UN  (Given)

3. SI+IT=RU+UN  (Transitive property, From 1 & 2)

   SI+IT=IT+UN (Given, IT= RU)

4.SI+UN (Cancelling IT on both sides on 3)

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.