Overview 3D Objects

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Nets

 Taking a deeper look. Click on the hyperlink below.

Over-viewing three dimensional objects.

4 Important parts

 Base

 Vertex/vertices

 Edge

 Face

Now that we know the four parts, let’s say them out loud!

 Base

 Face

 Vertex

 Edge

 Math net

Table A for the chance to win 100 points!!!!!

 What is a flat two-surface of a threedimensional shape? Can you point to it using your shape on the table?

 FACE

 How many faces are on your shape?

Table B for the chance at

100 points!!!

 What is a line segment formed where two faces of a three -dimensional shape meet?

 An Edge

 How many edges are on your shape?

Table C for the chance to win 100 points!!

 What is the “bottom face” of a threedimensional object?

 BASE

Table D for the chance to win 100 points!!!

 Looking at the picture below, where is/are the vertex/vertices located?

 Got it cornered? Get it!

Vertex ---corner!

Vertices

--Corners

Taking a deeper look

 Now that we’ve had a chance to see the different parts of three dimensional objects.

Let’s take a look at a few types of threedimensional shapes.

 Cube

 Rectangular Prism

 Cylinder

 Pyramid

 Cone

Table E for the chance to win 100 points!!!

 What is the difference between a rectangular prism and a cube?

 The

cube

is a three-dimensional shape with six identical square faces.

 A

rectangular prism

is a prism with a top and bottom (base) that are congruent rectangles.

Table F for the chance to win 100 points!!!

 What is the difference between a cone and a cylinder?

 A

cylinder

is a three-dimensional shape with two opposite faces that are congruent circles. The side (lateral surface) is a rectangle that is “wrapped around” the circular faces at the ends.

 A

cone

is a three-dimensional shape with a circular base and a vertex opposite the base

Surface Area

 The surface area of a space figure is the total area of all the faces of the figure.

For the chance to win 100 points—all tables!!!

 What is the surface area of a box whose length is 8, width is 3, and height is 4?

 This box has 6 faces: two rectangular faces are 8 by 4, two rectangular faces are 4 by 3, and two rectangular faces are

8 by 3. Adding the areas of all these faces, we get the surface area of the box:

 8 × 4 + 8 × 4 + 4 × 3 + 4 × 3 + 8 × 3 + 8 × 3 =

32 + 32 + 12 + 12 +24 + 24= 136

Volume

 Volume is a measure of how much space a space figure takes up. Volume is used to measure a space figure just as area is used to measure a plane figure.

 So what does that mean. It’s all about what the shape can hold.

For the chance to win 100 points– all teams!!!

 What is the difference between surface area and volume?

 Surface area- it the area of the faces of the three-dimensional object combined.

 Volume is the space on the inside of the three-dimensional object.

Terms to remember

(repeat after me)

 Face

 Base

 Vertex/Vertices

 Edge

 Cube

 Rectangular Prism

 Cylinder

 Pyramid

 Cone

 Surface Area

 Volume

Ticket out the door

 How many faces can be found on a rectangular prism?

Homework

Ace p 10-17

1st period

# 15,16,26,28a,29

2nd period #16,26,28a,29a

3rd period

#16,26,28a,29a

4th period

#16,26,28a,29a

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