INTRODUCTION TO COORDINATES Form 1 Mathematics Chapter 8

Reminder Lesson requirement ◦ Textbook 1B ◦ Workbook 1B ◦ Notebook ◦ Folder Before lessons start ◦ Desks in good order! ◦ No rubbish around!

Reminder Oral Re-Dictation ◦ 5 Feb (Tue) – 7 Feb (Thu) CBQ ◦ 6 Feb (Wed) SHW (Chapter 8) ◦ Lunar New Year break

Rectangular coordinates What is ( x, y )?

Rectangular coordinates What are the coordinates of A, B and C?

Rectangular coordinates Quadrant ( 象限 )

Time for Practice Pages 40 – 42 of Textbook 1B ◦ Questions 2 – 10 Pages 14 – 15 of Workbook 1B ◦ Questions 2 – 7

Polar coordinates (p.58) Locate the position from a fixed point

Polar coordinates (p.58) One axis: x-axis (polar axis) ( r,  ) represents a point with 2 values: radius vector and polar angle which are the corresponding distance (r) from the pole (0) and the anti-clockwise angle (  ) from the polar axis

Polar coordinates (p.58) Radar Heyuan ( 河源 ) is (3.3, 70  ) Macau ( 澳門 ) is (1.4, 190  ) Guangzhou ( 廣州 ) is (2.5, 130  )

Polar coordinates (p.58)

Time for Practice Pages 63 – 64 of Textbook 1B ◦ Questions 1 – 6 Pages 25 – 16 of Workbook 1B ◦ Questions 1 – 4

Reminder Oral Re-Dictation ◦ 5 Feb (Tue) – 7 Feb (Thu) CBQ ◦ 6 Feb (Wed) SHW (I) and SHW (IV) ◦ 25 Feb (Mon)

Enjoy the world of Mathematics! Ronald HUI