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3 years ago

3

The figure below shows circle with center O and two perpendicular diameters.

1 answer:

nydimaria [60]3 years ago

8 0

Hello,

Triangles OAB,BOC,COD,DOA are isocele and right , are thus equals and have the same hypothenus . The quadrilater ABCD is a diamond (having 4 sides equals) and its diagonals perpendicular is thus a square.

(Sorry for my poor english comming from France)

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