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Trigonometry

- Introduction to Trigonometry

Review of Triangles

- Labeling Triangles
- Vertices
- Sides

A

b

c

C

B

a

Review of Triangles

- Sum of Angles

?A ?B ?C 180?

A

C

B

Review of Triangles

- Sum of Angles

?A ?B ?C 180?

A

?A ? ? 180?

??

??

?A 180? - 70? - 33?

?A 77?

77?

70?

70?

33?

33?

C

B

Types of Triangles

- Scalene
- Isosceles
- Equilateral
- Right

Scalene Triangle

Isosceles Triangle

Sides Opposite the Base Angles are Equal

Base Angles are Equal

Example

5.8 cm

x

5.8 cm

79?

65?

65?

180? - 22?

158?

158?

79?

2

Equilateral Triangles

Example

60?

x

y

60?

4.5

Altitudes

vertex

opposite side

Altitudes in Isosceles Triangles

100?

50?

50?

18

9

9

Altitudes in Equilateral Triangles

??

? ft

25 ft

Right Triangles

hypotenuse

leg

90?

leg

Pythagorean Theorem

hypotenuse

c

leg

a

leg

b

Pythagorean Theorem

- Is this a right triangle?

5.4 cm

1.9 cm

4.9 cm

NO 29.16 isnt equal to 27.62

Pythagorean Theorem

8 ft

8

6 ft

6

?

Example

1.2

4.4

x

Pythagorean Theorem

28 ft

28

?

45

45 ft

Example

x

13 cm

32 cm

Practice Set 1

- Pages 6 8 1 -14 all

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For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

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