Which of the following is not an example of supplementary angles?

Can someone pls ! pls answer all. no explanation needed..

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

The product of sin 30 degrees and sin 60 degrees is same as the product of