Day 161 – Modelling a tree trunk

Introduction When we see a tree, we can think of it a being composed of numerous geometric figures fused together. With this, we can make they say measure its size and describe its shape. This concept of representing a surface or an object in terms of geometric figures in very common in graphics designs, a computer application. It is also widely used in arts where a picture of a tree is modeled in terms of geometric figures to bring out some appealing and admirable picture. In this lesson, we are going to model a tree trunk. Identify all the objects used in modeling. Suggest any other figures that may be used instead of the one(s) used.

Vocabulary Modelling Modelling is used here to imply using different images to come up with a design of a final image. For our case, we are using a geometric figures to come up with a design of a tree.

Modelling a tree trunk A tree is a dimensional tree object; hence, if we want to model it, we use a 3-dimensional figure. The most common images used are the regular and irregular sphere, cylinders, cones, cylinders, pyramids and prisms among others. We will come up with a tree trunk they try to find out the kind of figures used.

We can now identify the objects used to model the tree trunk. 10 4 2 3 1 5 6 7 8 9 11 12 13 14 15 16 17 We can now identify the objects used to model the tree trunk.

From the figure above, 1, 3, 4, 5, 6, 7, 8 and 9 are frustum of rectangular or square based pyramid, 2 is a cuboid, 10, 11, 12, 13, 14, 15, 16 and 17 are cylinders.

Example Explain why we cannot use rectangles, circles and triangles to model a tree trunk. Solution The rectangle circle and triangles are plane figures, 2 dimensional figures, therefore, they cannot be used to model a tree trunk because, to the contrary, it is a three dimensional figure.

homework Identify figure(s) that can be used to model a fruit of a tree Cuboid Sphere Ellipsoid Pyramid

Answers to homework Sphere and an ellipsoid

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