### Professor Brown

Ch. 6 & 7

 t l r n d i u a i t s i u c y a n r o r a t i o a n d p r o p o r t i o n l l m x i a i x m c e s t d o i e i s l t o n o t a o l o n n n u s r s t p m a v i n s a a t u r l p q s a n a i r u r r r r g a o n a i a i m l n u n l o e r n i r s e t r i x t u i a q t n n n x s n e p t e x a x a l m a e g a x a s m e a n p r o p o r t i o n a l a o c s x t r p e t s l p i s s a r d o c n c r c p x x t n o e p i e e i m a u t s e i t n a c e s x l o t v g p n n r y y r t e m o n o g i r t l s m m i m y e c t e p i a m n c n n o r n p x n m n l c l l u s e c a s e s e t e e e m u e e t e i u t c t t g a e y a s t a e s x n a s e o o i a n t n i p e o o y t t n i o i t v o n a r p t n t g o a c o n c i r l m n i t e r s
 solve an equation extremes use cases similarity cross multiplication great circle ratio and proportion trigonometry tangent mean proportional counterexample secant

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