RESOURCE 4 CONSTRUCTING AN EQUILATERAL TRIANGLE JUNIOR CYCLE

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RESOURCE 4: CONSTRUCTING AN EQUILATERAL TRIANGLE JUNIOR CYCLE GRAPHICS STRAND: 2 D Graphics Spatial

RESOURCE 4: CONSTRUCTING AN EQUILATERAL TRIANGLE JUNIOR CYCLE GRAPHICS STRAND: 2 D Graphics Spatial Reasoning, Design Thinking, Communicating, ELEMENT: Geometric Principles & Constructions C LEARNING OUTCOMES: 1. 1, 1. 2, 1. 3, 1. 4, 1. 6, 1. 9, 1. 10 & 1. 12 Greek Alphabet LANGUAGE LINK RATIONALE Equipment Drawing Board, T-Square, 2 H/5 H Pencil, Set-Square, Compass & Masking tape Step 1: Set up and line out page as per specification Step 2: Draw line AB at desired base The ‘Auld’ƟTriangle! The theta (Ɵ) symbol used to A Method for Drawing an represent mathematical angles is derived Equilateral Triangle from the ancient. TRACKER LEARNING Greek language HISTORY LINK JC KEY SKILLS BEING LITERATE, BEING NUMERATE, COMMUNICATING & MANAGING MYSELF Step 3: Take compass and set KEY SKILL ELEMENTS EXPRESSING IDEAS CLEARLY & ACCURATELY, EXPRESSING IDEAS MATHEMATICALLY, USING LANGUAGE AND SETTING & ACHIEVING PERSONAL GOALS distance between needle and led to STATEMENTS OF LEARNING SOL 15 AND SOL 21 equal base length LEARNING OUTCOMES 1. 1, 1. 2, 1. 3, 1. 4, 1. 6, 1. 9, 1. 10 & 1. 12 Step 4. Place need of compass on ACTION VERBS ILLUSTRATE, APPRECIATE & COMMUNICATE length point A and swing arc WHAT IS THE DEFINITION OF AN EQUILATERAL TRIANGLE? KEY QUESTIONS Ɵ Step 5: Place needle of compass on point B and swing a second arc Step 6: Locate arc intersection The Ancient Egyptian Pyramids contain a square base and four triangular sides, similar to the triangle here. 3 -2 -1 STUDENT REFLECTION A HOW MANY DEGREE’S DOES AN EQUILATERAL TRIANGLE (OR AN TRIANGLE FOR THAT MATTER) CONTAIN? Ɵ WHY IS AN EQUILATERAL TRIANGLE AN IMPROTANT GEOMETRIC CONSTRUCTION? 3 THINGS I LEARNED – WRITE IT ON THE PAGE 2 THINGS I WANT TO KNOW MORE ABOUT – WRITE IT ON THE PAGE 1 QUESTION I STILL HAVE – WRITE IT ON THE PAGE B point C Step 7: Draw a line to connect point |Base Length| C to A and point C to B Step 8: Equilateral triangle is now formed and contains three equal angles and three equal lengths To mathematically calculate the angle in an equilateral triangle divide the number of sides (three) into 180°. For example 180°÷ 3 = 60° MATHS LINK JUNIOR CYCLE GRAPHICS SCOILNET PDST JOE LYSTER 2019/20