Which formula would be used to find the measure of
angle 1?
1/2 (a° + b°)
1/2 (a° - c°)
1/2 (b° + c°)
1/2 (a° - b°)

25 is obviously the correct answer

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c

122-62 because that is subtraction.