Or

Author:
Jonathan Heeren

9.3.4.4 Use coordinate geometry to represent and analyze line segments and polygons, including determining lengths, midpoints and slopes of line segments.

a) I can determine the slope of a line.

b) I can determine the distance (length) between points

on a coordinate plane.

c) I can determine the midpoint of a segment given

coordinates of the endpoints.

d) I can use slopes and lengths to analyze polygons.

Tutorial

this is a proof of how the rule for 30-60-90 triangles work

This is a video on how 45-45-90 triangles work.