P1 Area=8.1 P4-(r,0) -4 -1 (a) The area of trapezoid is the height times the average of the two bases or with this parameterization: 2r + 2x • Y. 2 What equation describes the constraint between x and y? x2 +y2 = r 22+y? = r2 + y? = r/2 y² – a? = r2 (b) If area is expressed as a function of x, what is the range of possible values for x, assuming x > 0? O 0, 00) [0,T/2] [0, r] O 10, r) (c) What is the maximum area of an inscribed trapezoid when r = 5, as described above?

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Part a and b are already answered! I just need part c.
s Lab (with Prof O'Bryant) / 09-extrema
Area=8.1
P4=(r,0)
3
-4
-1
(a) The area of trapezoid is the height times the average of the two bases or
with this parameterization:
2r + 2x
•y.
2
What equation describes the constraint between x and y?
2²+y? = r
x2+ y? = r2
2²+y? = r/2
Oy? – x? = r²
(b) If area is expressed as a function of x, what is the range of possible
values for x, assuming x 2 0?
O [0, 00)
[0, r/2]
[0, r]
(c) What is the maximum area of an inscribed trapezoid when r = 5, as
described above?
Transcribed Image Text:s Lab (with Prof O'Bryant) / 09-extrema Area=8.1 P4=(r,0) 3 -4 -1 (a) The area of trapezoid is the height times the average of the two bases or with this parameterization: 2r + 2x •y. 2 What equation describes the constraint between x and y? 2²+y? = r x2+ y? = r2 2²+y? = r/2 Oy? – x? = r² (b) If area is expressed as a function of x, what is the range of possible values for x, assuming x 2 0? O [0, 00) [0, r/2] [0, r] (c) What is the maximum area of an inscribed trapezoid when r = 5, as described above?
Inscribed figures
A trapezoid is inscribed in a semicircle of radius r so that one side is along
the diameter (the x-axis in the figure).
We will find the maximum possible area for the trapezoid.
In the figure, the value of r can be adjusted by moving point P4. The point
P3 can be moved along the semicirce of radius r to change the inscribed
trapezoid. When adjusted the inscribed area changes. This area can be
used to roughly identify the values for x and y that maximize the area for a
given r, but in the problem you will identify this value exactly.
UsXGraph v1.2.2 Copyright (C) see https://jsxgraporg
P3=(x,y)
Area=8.1
P1
P4-(r,0)
-4
-3
-1
3
-1
- O + +
(a) The area of trapezoid is the height times the average of the two bases or
with this parameterization:
2r +2x
Transcribed Image Text:Inscribed figures A trapezoid is inscribed in a semicircle of radius r so that one side is along the diameter (the x-axis in the figure). We will find the maximum possible area for the trapezoid. In the figure, the value of r can be adjusted by moving point P4. The point P3 can be moved along the semicirce of radius r to change the inscribed trapezoid. When adjusted the inscribed area changes. This area can be used to roughly identify the values for x and y that maximize the area for a given r, but in the problem you will identify this value exactly. UsXGraph v1.2.2 Copyright (C) see https://jsxgraporg P3=(x,y) Area=8.1 P1 P4-(r,0) -4 -3 -1 3 -1 - O + + (a) The area of trapezoid is the height times the average of the two bases or with this parameterization: 2r +2x
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