standard_description: Use similar triangles to explain why the slope m is the same between any two distinct points on a non-vertical line in the coordinate plane; derive the equation y = mx for a line through the origin and the equation y = mx + b for a line intercepting the vertical axis at b.
problem_activity: Task
A spider walks on the outside of a box from point A to B to C to D and finally to point E as shown in the picture below.
[IMG]
Draw a net of the box and map out the path of the spider on the net.
Compare your net with those of some other people.
Cut out the net and put the box together to see if you are right.
How long is the path of the spider?


aligns: no