Page 63 - RME-Based Bilingual E-Module

GLOSSARY

A
Arc: any smooth curve joining two points. The length of an arc is known as its arc length.
C

Circumference: the length of closed curve that coincides with circle.
Cone: a 3D shape with curve that resembles regular n-sided pyramid with circle base.
Curved-face three-dimensional shape: object that have curved sides. For example, cylin-
ders, cones and spheres.
Cylinder: a shape that is bounded by two circular planes as the base and the top and a
curved plane as vertical side which is called a lateral area.
D
Diameter: the line segment of the circle through the center.
H
Height: the vertical length of an object from top to bottom.
L
Lateral area: curved-face
N
Nets: combinations of polygons that make a 3D shape.
P

Prism: a three-dimensional shape bounded by identical n-side base and cap and square
or rectangular vertical sides.
R

Radius: the distance from the center of a circle to its perimeter, or from the center of a
sphere to its surface.
S
Sector: a wedge obtained by taking a portion of a disk with central angle
Slant height: the distance measured along a lateral face from the base to the vertex
Sphere: the set of all points in three-dimensional Euclidean space R3 that are located at
a distance r (radius) from a given point (the center).
Surface area: the total area of all sides of the shape.
T
Three-dimensional shape: objects that have dimensions of length, width, height. For ex-
ample prisms, pyramids, cubes.
V
Volume: a calculation of how much space can be occupied in the object.

RME-BASED BILINGUAL E-MODULE— 25