G
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| geometric solid (4) A 3-dimensional shape bounded by surfaces. Common geometric solids include the rectangular prism, square pyramid, cylinder, cone, and sphere. Despite its name, a geometric solid is "hollow;" it does not include the points in its interior.
girth (3) The measure around an object.
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H
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height of a parallelogram (4) The shortest distance between the base and the side opposite the base.
height of a triangle (4) The shortest distance between the base and the vertex opposite the base.
hemisphere (4) Half of a sphere. See sphere.
heptagon (1) A 7-sided polygon.
hexagon (1) A 6-sided polygon.
Home Link (K) A math activity intended to provide follow-up and enrichment at home.
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I
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| image (4) The reflection of a picture or object that you see when you look through a transparent mirror. See transparent mirror.
improper fraction (4) A fraction that names a number greater than or equal to 1. A fraction whose numerator is equal to or greater than its denominator.
inch (in) (1) In the U.S. customary system, a unit of length equivalent to  of a foot.
inequality (K) A number sentence stating that two quantities are not equal, or might not be equal. Relation symbols for inequalities include:  (not equal), < (less than), > (greater than),  (less than or equal),  (greater than or equal).
integer (4) Any whole number or its opposite.
Example: -2, 2, 6, -100 are examples of integers.
intersect (3) To meet (at a point, line, and so on).
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inscribed polygon (4) A polygon is said to be inscribed in another figure if the vertices of the polygon lie on the other figure.
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| irregular polygons (1) Polygons with sides of different lengths.
isosceles triangle (4) A triangle in which two of the three sides are the same length.
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K
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| kite (1) A quadrilateral with exactly two pairs of adjacent congruent sides. (A rhombus is not a kite.) |
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L
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| latitude (4) A measure (in degrees) of how far north or south of the equator a location is on Earth; determined by circles of latitude parallel to the equator.
line (3) The extension of a line segment forever.
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| line graph (3) A graph in which points used to represent data are connected by a line or line segments. |
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| line of reflection (mirror line) (4) A line halfway between a picture or object (pre-image) and its reflected image. |
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| line of symmetry (2) A line through a symmetric figure. Each point in one of the halves of the figure is the same distance from this line as the corresponding point in the other half. That is, a line that divides a figure into two parts, with each part the exact mirror image of the other. |
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| line plot (4) A sketch of data in which check marks, X's, or other marks above a number line show the frequency of each value. |
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line segment (1) A straight path joining two points, called endpoints of the line segment. A line segment can be any length and is the shortest path between two points.
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| logic grid (4) A grid of rows and columns used to organize the information in a problem. |
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| longitude (4) A measure (in degrees) of how far east or west of the prime meridian a location is on Earth; determined by semicircles of longitude connecting the North Pole and the South Pole. |
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A B C D E F G H I K L M N O P Q R S T U V W X Y Z
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, 
, 
, 
are improper fractions.