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11/01/2016 UNIT 10 MIDPOINT OF A LINE SEGMENT Teacher: DO THI DOAN HIEN Class: 6A1 ThuVienDeThi.com REVIEW On the ray Ox, draw two line segments OM and ON so that OM=3cm, ON=6cm compute the length of MN? Compare OM and MN QUESTION ThuVienDeThi.com Mr M, what’s your name? SOLUTION On the ray Ox, draw two line segments OM and ON so that OM=3cm, ON=6cm Calculate the length of MN? Compare OM and MN 3cm M N x ٠ ٠ ٠ 6cm On the ray Ox, we have OM < ON (3cm MN = – => MN = 3(cm) O So : MN =3 cm OM = 3cm MN =3cm OM = MN Point M divides line segment ON into congruent parts ThuVienDeThi.com UNIT 10 MIDPOINT OF A LINE SEGMENT DEFINITION The point M of line segment AB is the point which is located between A, B and has the equal distance from A, B A midpoint divides a line segment into two congruent segments AM B Point M is midpoint of line segment AB Note: The midpoint of line segment AB is also known as the central point of line segment AB ThuVienDeThi.com REMEMBER A ٠ M ٠ M is midpoint of line segment AB B ٠ oM is between A, B oM is equidistant from A, B (MA = MB) ThuVienDeThi.com APPLY: IN EACH CASE, IS M MIDPOINT OF LINE SEGMENT AB OR NOT, AND WHY? M A B A M B A B A M M Fig M M is is not not midpoint between of A, line B segment AB Fig Fig MMisis not between midpoint but not of line equidistant segment from AB A, B M is not M is midpoint equidistant of line from but not segment A, B between AB ThuVienDeThi.com B Fig MM is is midpoint between of line and segment equidistant AB A, B from HOW TO DRAW THE MIDPOINT OF A LINE SEGMENT? i) Using straight ruler with measurements Draw midpoint K of For example: M K N ThuVienDeThi.com segment MN=5cm HOW TO DRAW THE MIDPOINT OF A LINE SEGMENT? ii) Folding paper: Make a midpoint on paper sheet, fold it so that sides overlap to define a midpoint ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com A B ThuVienDeThi.com ... distance from A, B A midpoint divides a line segment into two congruent segments AM B Point M is midpoint of line segment AB Note: The midpoint of line segment AB is also known as the central... MIDPOINT OF LINE SEGMENT AB OR NOT, AND WHY? M A B A M B A B A M M Fig M M is is not not midpoint between of A, line B segment AB Fig Fig MMisis not between midpoint but not of line equidistant segment... of line segment AB ThuVienDeThi.com REMEMBER A ٠ M ٠ M is midpoint of line segment AB B ٠ oM is between A, B oM is equidistant from A, B (MA = MB) ThuVienDeThi.com APPLY: IN EACH CASE, IS M MIDPOINT