Activity for cos(a+b) formula

Question 1

Which segment is ?

Question 2

Which segment is ?

Question 3

Which segment is ?

Question 04

Which segment is ?

Question 5

Which segment is ?

Question 6

Which segment is ?

Question 7

What is an expression in terms of and for the length of AB? Hint: Use right triangle ABG.

Question 8

Explain why angle CAD must be congruent to angle GEF?

Question 9

Write an expression in terms of and for the length of FG? Hint: Use right triangle EFG

Select all that apply
  • A

Question 10

In question 5, you should have found that segment AI can be called But AI is also the difference of AB-IB=AB-FG. What is another (more complicated) expression for the length of AI?

Select all that apply
  • A
  • B
  • C
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