5 Min None. This is the first lesson. Page 95 REVIEW AND CORRECTION OF HOMEWORK 3Min Answer the following questions: • Start with the INTRODUCTION What is the difference between a line and a line segment? constructions of lines, (MENTAL MATHS) What is an angle? so that learners can What is bisection? first explore angle Name the instruments in the mathematical set. relationships on straight lines. 17 Activity 1 . • Construction of LESSON PRESENTATION/ Min special angles DEVELOPMENT Discuss in your groups the following words: without protractors Perpendicular-a line that intersects another line at 90˚ are done by: - Perpendicular bisector- a line that intersects another line bisecting a right at a right angle, dividing it into two equal sections. angle to get 45° - Arc - a section of a curve, part of the circumference of a drawing an circle. equilateral triangle Compass- instrument used for drawing arcs with a specific to get 60° - radius. bisecting the angles of an equilateral Protractor- an instrument used for the measuring for the triangle to get 30° size of an angle. Activity 2 2.1. Bisecting a line segment with a ruler. Draw line segment AB and determine its midpoint.
REVIEW AND CORRECTION OF HOMEWORK 5 Min None. This is the first lesson. Page 95 INTRODUCTION (MENTAL MATHS) 3Min Answer the following questions: What is the difference between a line and a line segment? What is an angle? What is bisection? Name the instruments in the mathematical set. • Start with the constructions of lines, so that learners can first explore angle relationships on straight lines. LESSON PRESENTATION/ DEVELOPMENT 17 Min Activity 1 Discuss in your groups the following words: Perpendicular-a line that intersects another line at 90˚ Perpendicular bisector- a line that intersects another line at a right angle, dividing it into two equal sections. Arc - a section of a curve, part of the circumference of a circle. Compass- instrument used for drawing arcs with a specific radius. Protractor- an instrument used for the measuring for the size of an angle. Activity 2 2.1. Bisecting a line segment with a ruler. Draw line segment AB and determine its midpoint. . • Construction of special angles without protractors are done by: - bisecting a right angle to get 45° - drawing an equilateral triangle to get 60° - bisecting the angles of an equilateral triangle to get 30°