Tell the students only the description of the shape and ask them to guess
the name of the shape. You can also have them draw the shape on the
board.
VOCABULARY
TRIANGLE - 3 sides, 3 angles
SCALENE TRIANGLE - 3 unequal sides
EQUILATERAL TRIANGLE - 3 equal sides
ISOSCELES TRIANGLE - triangle with 2 equal sides
QUADRILATERAL - 4 sides, 4 angles
RHOMBUS - 4 equal sides and no right angles
SQUARE - 4 equal sides, 4 right angles
TRAPEZOID - 4 sides, 1 pair of sides parallel
PARALLELOGRAM - 4 sides, both pairs of opposite sides are parallel
LINE SEGMENT - part of a line consisting of a path between two
endpoints.
POLYGON - enclosed shape with line segments and angles
PENTAGON - 5 sides, 5 angles
HEXAGON - 6 sides, 6 angles
HEPTAGON - 7 sides, 7 angles
OCTAGON - 8 sides, 8 angles
NONAGON - 9 sides, 9 angles
DECAGON - 10 sides, 10 angles
HENDECAGON - 11 sides, 11 angles
DODECAGON - 12 sides, 12 angles
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