Calculating Distance
Name an example where you might not be able to measure something with a ruler.
Ruler is too short, physical obstacles, too lazy, etc.
What is the formula for area of a circle?
πr2
Is the bear nearsighted or farsighted?
The bear is nearsighted.
Name 3 tools you may need to calculate distance with the sine law.
Ruler, calculator, clinometer.
What is the extended sine law?
a/SinA = b/SinB = c/SinC = 2r = d
In the bear question, did the person need to move his campsite?
Yes, as the bear was less than 30m away.
What career fields might use the sine law? (name 3)
Astsronomy, Architecture, Land surveying, Investigating
What is a circumscribed triangle?
A triangle in which all its vertices touch the circumference of a circle.
"Learning is like exercising a muscle"
Why can't you use the cosine law for some circumstances when finding distance?
You need to know at least the length of two sides for the cosine law, which in real life applications you can only measure one side a lot of the time.
What do you use the extended sine law to find? (4 things)
Radius, diameter, circumference, area of a circle with a circumscribed triangle.
What is the prescription of the bear?
-3.50 diopters