11. The triangle on the left has interior angles 1, 2, and 3. Marta copied this triangle 3 times, rotated those triangles, and placed them together so that
angles 1, 2, and 3 were aligned. What does this allow you to conclude about the interior angle
measures of a triangle? Explain.

Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.