Lesson 4.5--Trig Ratios

Brendan Aydt, 07.02.2023


  • 1. Lesson 4.5--Trig Ratios--Page 1
  • 2. Lesson 4.5--Trig Ratios--Page 2
  • 3. Lesson 4.5--Trig Ratios--Page 3
  • 4. Lesson 4.5--Trig Ratios--Page 4
  • 5. Lesson 4.5--Trig Ratios--Page 5
  • 6. Lesson 4.5--Trig Ratios--Page 6

1.

Lesson 4.5--Trig Ratios--Page 1

In Lesson 4.4, you learned how to use one example of a 30-60-90 triangle to find missing side lengths in any other 30-60-90 triangle. You can use the same approach to find missing sides in other right triangles, and you can do so more easily using trigonometric ratios.
Use the applet to find JK. If you need a hint, see the text below.
Hint for Question 1
Drag point A to create a triangle that is similar to [math]\triangle JLK[/math]. (You probably won't be able to get the exact angle measure, so get as close as possible.) Use the similar triangles to set up a proportion that can be solved for JK.
Find JL in the above diagram.
– Brendan Aydt

2.

–

3.

–

4.

–

5.

–

6.

–

Information