In a grid of an auditorium, the vertices of a section of seats are A(40, 20) , B(80, 20) , C(100, 70) , and D(40, 70) . The coordinates are measured in feet. Find the area of the section.

Step-by-step explanation:

Given

Required

Determine the Area

The area of the section is:

Substitute values for the x's and y's

Hence, the area of the section is 2900ft^2

angle addition postulate

2x=56

step-by-step explanation:

i believe the answer is the polygon, heptagon.