Difference between revisions of "2020 CMC 12B Problems/Problem 19"

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==See also==
 
==See also==
{{CMC12 box|year=2020|n=B|num-b=18|num-a=20}}
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[[Category:Intermediate Geometry Problems]]
 
[[Category:Intermediate Geometry Problems]]
 
{{MAA Notice}}
 
{{MAA Notice}}

Latest revision as of 17:16, 7 September 2020

Let $ABCD$ be a convex quadrilateral such that $AB=4, BC=4, CD=3, DA=7$. There exists a unique point $P$ inside quadrilateral $ABCD$ such that the areas of $\triangle PAB, \triangle PBC, \triangle PCD, \triangle PDA$ are all numerically equal. What is the value of $PA^2+PB^2+PC^2+PD^2$?

Solution

suppose $A, B, C$ are collinear then quadrilateral $ABCD$ becomes a triangle with sides $3, 7, 8$

See also

2020 CMC 12B (ProblemsAnswer KeyResources)
Preceded by
Problem 18
Followed by
Problem 20
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
All CMC 12 Problems and Solutions

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