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Question Number 79309 by mr W last updated on 24/Jan/20

Commented by mr W last updated on 24/Jan/20

$O, A, B, C a r e t h e c e n t e r s o f t h e$ $c o r r e s p o n d i n g c i r c l e s .$ $p r o v e t h a t O A C B i s a r e c t a n g l e .$
Commented by john santu last updated on 24/Jan/20

$i c a n p r o v e b y u s i n g v e c t o r$
Commented by mr W last updated on 24/Jan/20

$p l e a s e p o s t y o u r s o l u t i o n, t h a n k s s i r!$ $i t h i n k t h e r e a r e m a n y w a y s t o p r o v e .$ $i p o s t e d t h i s q u e s t i o n t o a s k i f t h e r e$ $i s a n e a s y w a y t o s e e t h a t i t i s o b v i o u s l y$ $a r e c t a n g l e .$
	Answered by key of knowledge last updated on 24/Jan/20

	$get ABCD is rectangle . prove$ $C = center of circle (sorry . i {can}^{'} t rwite good)$
	Commented by mr W last updated on 24/Jan/20

	$c e r t a i n l y t h i s i s a g o o d w a y t o p r o v e .$ $t h a n k s s i r!$
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