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[Label1]
Caption=ABCD is a convex quadrilateral ~~with diagonals AC and BD intersecting ~~at X. The circumcircles of the triangles ~~AXB, BXC, CXD and DXA have centres ~~P, Q, R and S respectively. Move one of ~~the vertices of the quadrilateral ABCD. ~~What do you notice about the ~~quadrilateral PQRS? ~~Make a conjecture about PQRS ~~and prove your conjecture. ~~
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Charset=204
FontName=Arial
FontSize=12
FontBold=True
ForeColor=11862016
BackColor=2631680
Transparent=False
X=-8.66140832624397
Y=5.93725570750594

[Button1]
Type=0
Caption=Hide
Charset=204
FontName=Arial
FontSize=9
FontBold=True
Forecolor=16711680
X=6.81480538443105
Y=2.22030080105007
Figure#1=12
Figure#2=9
Figure#3=10
Point#1=7
Point#2=8

[Button2]
Type=3
Caption=To build macros Center of Circumcircle
Charset=204
FontName=Arial
FontSize=9
FontBold=True
Forecolor=10485760
X=-8.19574121192978
Y=-4.26085409597485
Path=prob51.DGF
Remind=True

[Button3]
Type=0
Caption=Calculation
Charset=204
FontName=Arial
FontSize=9
FontBold=True
Forecolor=255
X=6.23993933181017
Y=4.65667114314192E-02
Label#1=2

