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kargarzadehsm
16.11.2019 •
Mathematics
In a grid of a backyard, the vertices of the floor of a shed are (20, 80), (50, 60), (50, 20), and (20, 20). the coordinates are measured in feet. find the area of the floor of the shed.
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Ответ:
The area of the floor of the shed is 1500 square feet.
Step-by-step explanation:
Given:
The vertices of the floor of a shed are: (20,80), (50,60), (50,20) and (20,20)
Let us plot the given vertices on a graph.
From the graph, it is clear that the given figure is a trapezium with opposite parallel sides being parallel to the y axis. The height of the trapezium is the side that is parallel to x axis.
The area of the trapezium ABCD is given as:
From the graph, AB = 60 ft, CD = 40 ft, AD = 30 ft
Therefore, the area is given as:
Therefore, the area of the floor of the shed is 1500 square feet.
Ответ:
1.8kg
55.5-53.8= 1.7 in the first weeks
3.5- 1.7= 1.8 for final week