Atriangle has two angles measuring 90 degrees and 50 degrees, calculate the third angle of the triangle.

a. 50

b. 40

c. 45

d. 75

The answer is b because 90 plus 50 equals 140. and the sum of all the angles i a triangle is 180. So you subtract 140 from 180 and get 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