6th Grade · Geometry
Horizontal Side
6.G.A.3
Definition
A side that runs left to right; its length is the difference of the x-coordinates.
Examples
- Top side from (1,3) to (4,3): length = |4-1| = 3.
- Subtract the x-coordinates of the endpoints.
Key rule
Find a horizontal side's length by subtracting x-coordinates.
Memory hook
Left-right side — subtract the x's.