1. Triangle Sum Theorem
2. Exterior Angle Theorem
3. Transversal
4. SAS Similarity Theorem
hope these help!
.12×10^5
... i got this by taking the first number 8 and then counting the places behind the 8 which would be 5 so than you move the decimal place by 5 so you get 8.12 then you show theirs 5 places behind the 8 by adding the 10^5 so you get 8.12×105
Hey friend this is rectangle because 90° angels are all on side opposite side are equal