If the coordinates are (3,11) (9,11) (9,6) (3,6) just look at the changes in the first number (the x coordinate) and the changes in the second number (the y coordinate). In this case, the x coordinate changes by 6 and the y coordinate changes by 5. You multiply the two and you have the area, 30.
Note: doesn't work if the first number and the second number change in every coordinate
Area = (base) x (height)= (5y - 3) x (11)= 55y - 33
Come on! 88 = 11 x 8, end of story.
867 square inches
The area of rectangle is : 216.0
It is (4, 5)
The area of rectangle is : 33.0
Area = (base) x (height)= (5y - 3) x (11)= 55y - 33
The area of the rectangle works out as 7 times 6 = 42 square units
28
It works out as: 5*8 = 40 square units
The area of rectangle is : 27.0
The area of rectangle is : 12.0
The area of rectangle is : 45.0
The sum is 11. The average is 5½. The area of a 3 x 8 rectangle is 24 (square units).
The area of rectangle is : 21.0
The area of rectangle is : 12.0
If you mean vertices of: (7, 3) (12, 3) (12, 11) (7, 11) then the area works out as 5 times 8 = 40 square units