T Madas Consider the standard paper sizes A

© T Madas

Consider the standard paper sizes A 1, A 2, A 3, A 4, A 5, … These are rectangles: similar to each other and each one being exactly half the area of the previous; in other words you create a smaller size by folding in half. Find the ratio of the sides of any size paper from this range. y A 4 x A 5 Y A 5 Being Similar: Y X = y x Double Area: XY = 2 xy X © T Madas

Consider the standard paper sizes A 1, A 2, A 3, A 4, A 5, … These are rectangles: similar to each other and each one being exactly half the area of the previous; in other words you create a smaller size by folding in half. Find the ratio of the sides of any size paper from this range. Being Similar: Y X = y x Double Area: XY = 2 xy © T Madas

Consider the standard paper sizes A 1, A 2, A 3, A 4, A 5, … These are rectangles: similar to each other and each one being exactly half the area of the previous; in other words you create a smaller size by folding in half. Find the ratio of the sides of any size paper from this range. c XY = 2 xy XY = 2 xy X Y x = 2 x y c c Double Area: X 2 = 2 x X = 2 x c Being Similar: Y X = y x © T Madas

Consider the standard paper sizes A 1, A 2, A 3, A 4, A 5, … These are rectangles: similar to each other and each one being exactly half the area of the previous; in other words you create a smaller size by folding in half. Find the ratio of the sides of any size paper from this range. Being Similar: Y X = y x X = 2 x © T Madas

Consider the standard paper sizes A 1, A 2, A 3, A 4, A 5, … These are rectangles: similar to each other and each one being exactly half the area of the previous; in other words you create a smaller size by folding in half. Find the ratio of the sides of any size paper from this range. X = 2 x c Being Similar: Y X = = 2 y x Y y = = 2 X x A 4 Y X © T Madas

© T Madas