t Sam pl
he “upright” is the v
l part of the ramp.
perpendicular lines create right angles
The ramps must have
Sam needs the ramps to have true vertical uprights, perpendicular
(90º) to the bases, so that she can put them back to back or against a
wall without a nasty gap to get your wheels caught in.
Perpendicular uprights are Slanted uprights create
perfectly vertical and let the wheel-trapping gaps.
ramps fit together.
But Sam’s first prototype is not squaring up
Even though it looked good on paper, now Sam’s built her
first ramp and…well, it’s just plain wonky.
objects that are
meet or cross at
a right angle.
How the jump
his one isn’t
And this angle isn’t
106 Chapter 3