The study of shapes, solids, and the parts that make them., geometry, A closed shape that has straight sides., polygon, The parts of the line that show the border of a two-dimensional shape., side, A characteristic that describes an object. The number of sides is an attribute of a shape., attribute, When two sides meet, they create an angle., angle, The point where two sides meet., vertex, A 4-sided polygon., quadrilateral, A 5-sided polygon., pentagon, Sides that go straight across side to side., horizontal, Sides that go straight up and down., vertical, An angle with a square corner., right angle, A quadrilateral with opposite sides that are parallel., parallelogram, 1 of 3 equal parts, thirds, 1 of 2 equal parts, halves, 1 of 4 equal parts, fourths, Tells how many equal parts of a whole., fraction, time when the minute hand is one-quarter around the clock (pointing at the 3), quarter past, when the minute hand is three-quarters around the clock (pointing at the 9), quarter to, when the minute hand is halfway around the clock (pointing at the 6), half past.

Math - Module 3

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