November 19, 2017

2D Geometry Focus

ANGLES AND SHAPES

BIG IDEAS:

(taken from “Big Ideas by Dr. Small”):
  • Some attributes of shapes are quantitative, others are qualitative.
  • Geometric shapes can be classified and sorted according to attributes.
  • The measurement of an angle is defined by how much one arm turns around a vertex relative to the other arm.

STUDENT LEARNING GOALS:

GOAL: I can classify angles and construct them up to 90°
GOAL: I can classify triangles and other polygons based on both angles and side lengths.
GOAL: I can construct a triangle and other polygons based on specified criteria.

CURRICULUM EXPECTATIONS:

  • sort and classify quadrilaterals by geometric properties related to symmetry, angles, and sides, through investigation using a variety of tools (e.g., geoboard, dynamic geometry software) and strategies (e.g., using charts, using Venn diagrams);
  • sort polygons according to the number of lines of symmetry and the order of rotational symmetry, through investigation using a variety of tools (e.g., tracing paper, dynamic geometry software, Mira)
  • measure and construct angles up to 180° using a protractor, and classify them as acute, right, obtuse, or straight angles;
  • construct polygons using a variety of tools, given angle and side measurements

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