The congruency theorem Side-Angle-Side (SAS) proves two triangles are congruent because both triangles have an included angle in between two congruent sides. True

False

Take the average. The average of two numbers is halfway between them.

We have 0.333… = 1/3 and 0.444… = 4/9. Then the average of these is

(1/3 + 4/9)/2 = (3/9 + 4/9)/2 = (7/9)/2 = 7/18

To get another number between 1/3 and 4/9, take the average of one of these and 7/18. For instance,

(1/3 + 7/18)/2 = (6/18 + 7/18)/2 = (13/18)/2 = 13/36

Or more simply, just chop off some of the non-terminating part and increment the last digit. For example,

• chop 0.333… down to 0.33, then increase the last digit by 1 to get 0.34

• chop 0.444… down to 0.44, then decrease the last digit to get 0.43