Download presentation

Presentation is loading. Please wait.

Published byRylan Sessions Modified over 3 years ago

1
Section 5-8 The Law of Cosines

2
A b c C a B

3
Solve ∆ABC if A= 120⁰, b=9, c=5

6
=12.3

7
=39.3⁰

8
Solve ∆ABC if A= 105⁰, b=12, c=9 A 105⁰ 12 9 C a B

9
a 2 = b 2 + c 2 - 2bc cos ALaw of Cosines a 2 = 12 2 + 9 2 - 2(12)(9) cos 105° a 2 = 280.9049137 a= 16.76021819 So, a = 16.8. B = 43.6°. C = 180° - (105° + 43.6°) C = 31.4°

10
B = 43.6°. C = 180° - (105° + 43.6°) C = 31.4°

11
Solve ∆ABC if A= 105⁰, b=12, c=9 A 105⁰ 12 9 C a B

12
A triangle ABC has a = 8, b = 9, and c = 7. What is the measure of angle C?

13
A triangle ABC has a = 7, b = 6, and angle A = 80º. Find the measure of side c.

14
Two airplanes leave an airport, and the angle between their flight paths is 40º. An hour later, one plane has traveled 300 miles while the other has traveled 200 miles. How far apart are the planes at this time?

16
To approximate the length of a lake, a surveyor starts at one end of the lake and walks 245 yards. He then turns 110º and walks 270 yards until he arrives at the other end of the lake. Approximately how long is the lake?

18
After the hurricane, the small tree in my neighbor’s yard was leaning. To keep it from falling, we nailed a 6-foot strap into the ground 4 feet from the base of the tree. We attached the strap to the tree 3½ feet above the ground. How far from vertical was the tree leaning?

19
After the hurricane, the small tree in my neighbor’s yard was leaning. To keep it from falling, we nailed a 6-foot strap into the ground 4 feet from the base of the tree. We attached the strap to the tree 3½ feet above the ground. How far from vertical was the tree leaning?

20
Hero’s Formula

23
Find the area of ∆ ABC.

Similar presentations

OK

THE LAW OF SINES states the following: The sides of a triangle are proportional to one another in the same ratio as the sines of their opposite angles.

THE LAW OF SINES states the following: The sides of a triangle are proportional to one another in the same ratio as the sines of their opposite angles.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To ensure the functioning of the site, we use **cookies**. We share information about your activities on the site with our partners and Google partners: social networks and companies engaged in advertising and web analytics. For more information, see the Privacy Policy and Google Privacy & Terms.
Your consent to our cookies if you continue to use this website.

Ads by Google

Ppt on eia report natural gas Download ppt on indian mathematicians and their contributions Games we play ppt on website Ppt on media in hindi Ppt on japanese culture Upload and view ppt online student Ppt on forward contract bankruptcy Ppt on meeting etiquettes of life Convert doc file to ppt online templates Ppt on blood stain pattern analysis cases