To do this part of the lesson,
download this Geometer's Sketchpad
Open the Sketchpad file and follow the following steps.
DATA: 12 cm bolt circle
diameter - 5 bolt pattern
The first thing we need to find is the BOLT SPACING
which is the number of degrees between each of the lug nuts.
STEP 1: Measure
<EAD, <DAC, <CAB , <BAE , <FAE
What do you notice about each of the lug spacings?
STEP 2: Add all the
angle measures. What do you get?
STEP 3: In a 4 bolt
pattern, each of the angle measures was measured as be 90. What is the
sum of all the angle measures?
STEP 4: Make a conclusion about the
sum of the lug spacing angles for any numbered bolt pattern.
If there were 6
lug nuts on a tire, what would the lug spacing be?
Problem Statement- -Go to Lesson