Austin test-drives his partially completed car (it has no body yet)
and it doesn't go very straight. He can't figure out why.
Bridget has been studying shapes in school and notices the triangles
on the plans and the ones on the car made by the axles aren't the
same. Austin says, "Close enough!" They argue about the
importance of Bridget's observation and go to Alex to settle the
argument. He's working on his old car and shows them the tires,
one of which has a wear pattern that suggests it's out of alignment.
Their discussion revolves around what that would mean. Finally Austin
has an "aha!" moment and runs off to fix his racer.
the Teacher Guide (PDF file) Lesson begins on page 41.
Activities for Geometry