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index number

(Encyclopedia) index number, in econometrics, a figure reflecting a change in value or quantity as compared with a standard or base. The base usually equals 100 and the index number is usually…

Animated Math Video: Comparing Solid Figures

In this video, Jackson learns the properties of basic three-dimensional geometric shapes by selecting the best shape (cube, sphere, cylinder, cone) and arranging them appropriately to build a tower.

geodesy

(Encyclopedia) geodesygeodesyjēŏdˈĭsē [key] or geodetic surveying, theory and practice of determining the position of points on the earth's surface and the dimensions of areas so large that the…