How to get the answer to this equation 1+4=5 2+5=12 3+6=21 8+11=?

The answer is 40. 1+4=5, 5+2+5=12, 12+3+6=21, 21 +8+11=40

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

Ibelieve it’s b? hopefully