Use the figures below to answer parts (a) through (c). (a) How many rectangles are there in each of these figures? (Note that rectangles may measure 1 by 1, 1 by 2, 1 by 3, and so on.) 1 rectangle 3 rectangles rectangles rectangles (b) How many rectangles are in this figure? a a b b a a b b There are C d d e f g h i j k 1 m n O rectangles. (c) How many rectangles are there in a 1 x n strip like that in part (b)? Use the Show Work learning aid to provide related calculations and additional reasoning to support your answer. (Type an expression using n as the variable.)

Use the figures below to answer parts (a) through (c). (a) How many rectangles are there in each of these figures? (Note that rectangles may measure 1 by 1,1 by 2,1 by 3 , and so on.) (b) How many rectangles are in thas foure? There are rectangles (c) How many rectangles are there h a 1n strip like that in part (b)? Use the Show Work leaining aid to provide related calcutations and addsional reasoning to support your answer (Type an expression uning n as the variable.) Use the figures below to answer parts (a) through (c). (a) How many rectangles are there in each of these figures? (Note that rectangles may measure 1 by 1,1 by 2,1 by 3 , and so on.) (b) How many rectangles are in thas foure? There are rectangles (c) How many rectangles are there h a 1n strip like that in part (b)? Use the Show Work leaining aid to provide related calcutations and addsional reasoning to support your answer (Type an expression uning n as the variable.)