The student will identify and trace, describe, and sort plane geometric figures (triangle, square, rectangle, and circle) according to number of sides, vertices, and right angles.
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Identify the attributes of an object (e.g., color, size, shape, thickness).
The student will a) define polygon; b) identify and name polygons with 10 or fewer sides; and c) combine and subdivide polygons with three or four sides and name the resulting polygon(s).
Understand that a triangle can be classified as either right, acute, or obtuse according to the measure of its largest angle.
Understand that a triangle can be classified as equilateral, scalene, or isosceles according to the number of sides with equal length.
Classify triangles as right, acute, or obtuse.