Bellringer

1
Bellringer

• Angle A (or ?)
• a 1, b , and c 2

2
Solving Right Triangles

• Section 5.5

3
Definitions

• Sine - the ratio of the length of the side
  opposite an angle to the length of the hypotenuse
• Cosine the ratio of the length of the side
  adjacent an angle to the length of the
  hypotenuse
• Tangent the ratio of the length of the side
  opposite of an angle to the length of the side
  adjacent to that angle

4
Ratios

• These ratios are the same for every triangle
• The sin(50) is the same ratio regardless of the
  size of the triangle, this is what lets us solve
  for all sides and angles of a triangle

5
Triangles

• We use capital letters
• (A, B, C) to label angles
• And we use lower-case
• letters (a, b, c) to label sides

6
Solving Right Triangles (pg. 270, ex. 2)

• Solve right triangle ?ABC. (Nearest degree and
  nearest tenth.)
• A 49 a 7
• B b
• C 90 c

7
Solving Right Triangles (pg. 270, ex. 3)

• Solve right triangle ?ABC. (Nearest degree and
  nearest tenth.)
• A a 8
• B b
• C 90 c 14