Hi everyone !

I've got some trouble...

IJKL is a square and [IJ] is confunded with [BC]

h is the height from A.

C1 is the red square

C2 is the green square

C3 is the blue square

a= [BC]

b= [CA]

c= [AB]

1. How to find IJKL using a and h

2. a< b< c. Classify C1, C2, C3 from the largest.

3. Find ABC triangles (their surface, S) when the square IJKL has the largest surface.

Thank you for your help.