Geometry Chart 1 — Basic Figures

Chart 1 is elementary's geometric foundation. Every figure named, every part labeled. Indirect aim: geometric vocabulary, preparation for geometric proof.

• Framework: Montessori
• Unit: Mathematics
• Learning area: Geometry
• Level: Ages 7-9

Objectives

• Identify basic plane figures: line, angle, triangle, quadrilateral, circle
• Name parts: vertex, side, diagonal
• Classify triangles by sides and angles
• Build vocabulary for further geometry

Materials

• Geometry Chart 1
• Plane figure nomenclature cards
• Compass, straightedge, ruler
• Recording paper

Instructions

1. Present Chart 1. 2. Name each figure. 3. Label parts: vertex, side, diagonal. 4. Classify triangles by sides (equilateral/isosceles/scalene) and angles (acute/right/obtuse). 5. Classify quadrilaterals (square, rectangle, rhombus, parallelogram, trapezoid, kite). 6. Match cards. 7. Draw each figure with compass+straightedge. 8. File.

Educator tip

Geometry is classification first, then measurement. Vocabulary matters — the child who knows 'parallelogram' uses it.

Assessment

Observe naming accuracy, classification, and construction.

More from Mathematics

• Congruence and Similarity
• Geometric Symmetry — Reflection, Rotation, Translation
• Measurement — Length in Metric
• Measurement — Weight and Mass
• Measurement — Capacity and Volume
• Measurement — Time and Calendar
• Measurement — Temperature and Thermometry
• Algebra — Simplifying Expressions