Take out your scientific calculator What does it mean for two triangles to be similar?

What information is sufficient to show that two triangles are similar?

Draw and label an example of two similar triangles.

Start on the DO NOW before the bell rings Participation Professional language It’s ok to be wrong! Be prepared and on time Push yourself and don’t give up Be on task Communicate any needs or concerns Clean up after yourself Do your homework Respect

Positive attitude Prepared and on time Assistance Engaging activities Patience and clarity Politeness Teach at your pace Communication Raffle tickets Monthly auction

Raffle tickets Problem Solvers of the Week

◦Must be on time to class every day◦Must participate fully in each station◦Must score a 3 or 4 on each exit slip

Positive Phone Calls Home Bathroom Passes Certificates for Most Improved, MVP, etc.

Competitions between classes Competitions between teams in each class Group activities Jeopardy Educational videos iPad activitites

Laziness Profanity Disrespect

1st warning-Warning 2nd warning-You need to have a

conversation with me (during or after class)

3rd warning-You will move seats for the day

4th warning-I will call your parents 5th warning-Referral to the office

Establish expectations Define the sine, cosine, and tangent ratios Understand the usefulness of trigonometry Use problem solving skills

Trigonometry is the study of the relationships between the sides and the angles of a

triangle.

In this lesson you will discover some of these relationships for right triangles.

All these triangles are similar by SAS or AA.

Notice that the ratio of the shorter leg’s length to the longer leg’s length is 3/5. The angle opposite the shorter leg is 31o.

The three right triangles are similar to each other by AA

Sine (sin) is the ratio of the length of the opposite leg to the length of the hypotenuse.◦ Sin (A) =opposite/hypotenuse◦ S=O/H

Cosine (cos) is the ratio of the length of the adjacent leg to the length of the hypotenuse.◦ Cos (A)=adjacent/hypotenuse◦ C=A/H

Tangent (tan) is the ratio of the length of the opposite leg to the length of the adjacent leg.◦ Tan (A)=opposite/adjacent◦ T=O/A

Establish expectations Define the sine, cosine, and tangent ratios Understand the usefulness of trigonometry Use problem solving skills