This document discusses geometric probability and provides examples of calculating probabilities based on ratios of lengths and areas. It gives the example of calculating the probability that a driver will be pulled over in front of a school based on the length of road in front of the school compared to the total length of the road. Another example calculates the probability that a fly will land on a beach ball based on the area of the beach ball relative to the total area of a blanket. The document concludes with assigning homework problems from page 774 #4-10 evens, 20-23, 30-33.

1. 11.7 Geometric Probability March 24, 2011
Bellwork
1. Find the measure of the central angle of a regular polygon with 24 sides.
15°
Find the area of each regular polygon.
110 cm2
374.1 cm2
HW pg. 774 #4­10 evens, 20­23, 30­33 1

2. 11.7 Geometric Probability March 24, 2011
11.7 Geometric Probability
Probability: measure of likelihood that the event will occur
Geometric Probability: ratio of geometric measures
Length: the probability that a driver speeding on McCabe will be pulled
over in front of the school is...
length in front of school
total length (of McCabe)
2.6 mi 0.2 mi
HW pg. 774 #4­10 evens, 20­23, 30­33 2

3. 11.7 Geometric Probability March 24, 2011
Area: the probability that a fly will land on the beach ball on the
blanket is...
area of beach ball
3'
1'
total area (of blanket)
5'
HW pg. 774 #4­10 evens, 20­23, 30­33 3

4. 11.7 Geometric Probability March 24, 2011
11.7 HW pg. 774 #4-10 evens, 20-23, 30-33
HW pg. 774 #4­10 evens, 20­23, 30­33 4