Representing 3-D Shapes 2-D
Mathematics Solutions from Chapter -1 - Representing 3-D Shapes 2-D
This chapter covers topics like solid shapes, faces, edges and vertices, nets for building 3D shapes, drawing solids in flat surface (2D drawing of a 3D), viewing different sections of a solid, and mapping.
Practice Other Topics from Representing 3-D Shapes 2-D
This topic covers the calculations for the surface area and volume of an object formed by combining any two basic solids, namely, cuboid, cone, cylinder, sphere and hemisphere. It defines and discusses formulas for the calculation of frustums.
This topic discusses the three terms faces, edges and vertices. It breaks up 2D and 3D objects as a composition of faces, edges and vertices to help students understand shapes better.
This topic explains the concept of surface development for 3D shapes. It challenges students by discussing multiple options for the net of the same object.
Students are expected to visualise 3D objects on paper. The topic explains three techniques, namely, oblique sketches, isometric sketches and visualising objects from a given angle. Exercises make use of multiple techniques and complex objects.
The topic covers three different ways of viewing a solid. First one is by studying a cross-section of the solid. The next one is by observing a 2D shape of a 3D object as a shadow and the third is by viewing a shape from different angles.
From this topic, we will talk about the mapping in brief. It discusses the meaning of visual estimation. We will learn how to measure the space inside a solid such as a box, a tank and many more through examples.
