How does reflection change the orientation of a figure

What is the area of triangle pqr on the grid? a triangle pqr is shown on a grid. the vertex p is on ordered pair 7 and 6, vertex q is on ordered pair 1 and 6, and the vertex r is on ordered pair 4 and 2. 5 square units 6 square units 10 square units 12 square units

Solve this problem! extra ! 3025/5.5 = a/90.75

What is the absolute value of -100000000000000?