Find the perimeter of the following
40 m
100 m

Geometry. i need step by step explanation on how to do each problem.

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

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?