Geometry Problem

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## Thursday, January 20, 2011

### Problem 570: Square, Center, Right Triangles, Congruence, Collinearity.

Labels:
center,
collinear,
congruence,
right triangle,
square

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AHE = 45 (▲EAH isoceles)

ReplyDeleteAHD = 90

OHD = OAD = 45 ( A, H, O, D lie on the same circle)

=> EOH = 180 => E, H, O collinear

BHDF paralellogram => H, O, F collinear

Nice problems!

ReplyDelete