8-6 Geo Law of Sines and Cosines

slidesmania.com

s

slidesmania.com

8-6 The Law of Sines

and Law of Cosines

slidesmania.com

Learning Target and Success Criteria

Learning Target

●I can use the law of sines to
find missing sides

●I can use the law of cosines
to find missing sides

Success Criteria

●I will use law of sines if I
know 2 angles and a
corresponding side.

●I will use law of cosines
when I know 2 sides and
the included angle

slidesmania.com

Law of Sines

slidesmania.com

Find x. Round to the nearest
tenth

Example 1

slidesmania.com

Find x. Round to the nearest
tenth

Example 2

Multiple Choice

Find m<B

• A
• B
• C
• D

Poll

How do you feel about The Law of Sines?

• I understand it

• I am getting it, but need more practice

• I have no idea what is going on

slidesmania.com

Find x. Round to the nearest
tenth

Example 3

Draw

Spot the differences from the left picture to the right picture

slidesmania.com

Find x. Round to the nearest
tenth

Example 4

slidesmania.com

Learning Target and Success Criteria

Learning Target

●I can use the law of sines to
find missing sides

●I can use the law of cosines
to find missing sides

Success Criteria

●I will use law of sines if I
know 2 angles and a
corresponding side.

●I will use law of cosines
when I know 2 sides and
the included angle

slidesmania.com

Law of Cosines

slidesmania.com

Find x. Round to the nearest
tenth

Example 5

slidesmania.com

Find x. Round to the nearest
tenth

Example 6

Multiple Choice

Find BC

• A

• B

• C

• D

slidesmania.com

Find x. Round to the nearest
tenth

Example 7

Poll

How do you feel about The Law of Cosines?

• I understand it

• I am getting it, but need more practice

• I have no idea what is going on

slidesmania.com

Learning Target and Success Criteria

Learning Target

●I can use the law of sines to
find missing sides

●I can use the law of cosines
to find missing sides

Success Criteria

●I will use law of sines if I
know 2 angles and a
corresponding side.

●I will use law of cosines
when I know 2 sides and
the included angle