Find the number of units between the origin and (8,-6)

Which of these triangle pairs can be mapped to each other using two reflections?

Can someone me out here and the tell me the greatest common factor

Raj encoded a secret phrase using matrix multiplication. using a = 1, b = 2, c = 3, and so on, he multiplied the clear text code for each letter by the matrix to get a matrix that represents the encoded text. the matrix representing the encoded text is . what is the secret phrase? determine the location of spaces after you decode the text. yummy is the corn the tomato is red the corn is yummy red is the tomato