Cyclic quads

Author:Stephen Sproule

CDEF is a cyclic quadrilateral Move point C to find a relationship between angles D and F. (You may need to study this for a while.) By moving point C does the relationship between angles C and E change?

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רישום חופשי
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bewijs stelling van Pythagoras
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oefening massa peren
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Subtraction
Addition
Inequalities
Numbers
Line Segment