H
hexagon
A six-sided polygon.
pages 59, 289
horizontal axis
In a coordinate grid, the x-axis. The axis that extends from left to right. (See also x-axis.)
pages 6, 217, 232, 249–254, 255–270, 271–273, 276–277
hundred thousandths
1 of 100 thousand equal parts of a whole (.00001).
pages 391–392
hundredths
1 of 100 equal parts of a whole (.01).
pages 365–366, 368–374, 378–379, 389, 390–392, 414–416
hundredths circle
A circle divided into 100 equal parts.
pages 365–367, 389
hundredths circle wheel
A circle divided into 100 equal sections used in exploring fractions, decimals, and percents.
pages 365–366, 376–377
hundredths grid
A square divided into 100 equal parts.
pages 390, 414