Bring note cards to class Bring workbook to class Bring colored pencils to class

1. Bring note cards to class Bring workbook to class Bring colored pencils to class

2. 1-28-13 Angle and Triangle Vocabulary Essential Questions: Where is geometry seen in the real world? What professions use geometry? BOP: What geometry term might you associate with each object? 1.one edge of a cardboard box line segment or line 2. the floor plane or rectangle 3. the tip of a pen point DWP: What is the measure of the smaller angle between the hour hand and the minute hand on a clock at eight o’clock? 120 degrees

3. Check your memory! Sketch an example for each

5. Flip Chart Directions • Have 25 3 by 5 or 4 by 6 note cards and a folder. A sturdy piece of paper is needed if folders are not available to hold the note cards that will be taped to it. • All note cards should be taped lined side up, with the red line at the bottom. Start by lining up the first note card with the bottom of the folder. Tape the note card in place. • Line the next note card up with the red line of the first note card. Tape it in place. Continue doing this until all 25 note cards taped down. • On the top note card, make it a “Title Note Card”. • On the next note card, write the word RAY in the part of the note card that is showing. Lift the top note card; write the definition of the word RAY. On the back of the note card, draw an example. • Continue through the note cards until all of the vocabulary is done. You should have 4 blank note cards. More vocabulary will be added throughout the unit.

7. We will make vocabulary cards for this unit. Cards should have the word and picture on the front. Definition on the back. Bring cards to class tomorrow. You will need 30 cards in all. ANGLE A figure formed by two rays with a common endpoint.

10. RAY A ray is a part of a line. It has exactly one endpoint. Name its endpoint first.

11. ANGLE A figure formed by two rays with a common endpoint.

12. VERTEX A vertex is the point where two sides intersect.

13. SIDE The side of an angle is one of the rays forming the exterior of the angle or a polygon.

14. 7-1 Points, Lines, and Planes GH Name the endpoint first when naming a ray. G H LM, or ML Use the endpoints to name a line segment. L M Course 2 A ray is a part of a line. It has one endpoint and extends without end in one direction. A line segmentis part of a line. or a ray that extends from one endpoint to another.

15. 7-1 Points, Lines, and Planes XY, or YX Helpful Hint Use two points on the line to name a line. X Y A number line is an example of a line. Course 2 A point is an exact location in space. It is usually represented as a dot, but it has no size at all point A Use a capital letter to name a point. • A A lineis a straight path that extends without end in opposite directions.

16. 7-1 Points, Lines, and Planes Q S R Helpful Hint A coordinate plane is an example of a plane. Course 2 A plane is a perfectly flat surface that extends infinitely in all directions. plane QRS Use three points in any order, not on the same line, to name a plane.

17. 7-1 Points, Lines, and Planes Course 2 Figures are congruent if they have the same shape and size. If you place one on top of the other, they match exactly. Line segments are congruent if they have the same length. Tick marks are used to indicate congruent line segments. In the illustration below, segments that have the same number of tick marks are congruent. Line segments AB and BC are congruent (one tick mark), and line segments MN and OP are congruent (two tick marks). B 5 ft N O 20 m 20 m 3 ft 3 ft C P A M 8 ft 16 m

18. SUMMARY: Where is geometry seen in the real world? What professions use geometry? Homework: Make index cards with words from column 1; Work on ratio and proportion Drawing due on Friday.