Introduce the cylinder, introduce the sphere

### 1.1. Knowledge to remember

**a) **Cylindrical introduction

Milk cartons are cylindrical in shape

Cylinder

The cylinder has two bases, two equal circles and one surrounding face.

**b)** Sphere Introduction

### 1.2. Solve textbook exercises page 126

**Lesson 1 Textbook page 126**

Which of the following figures is a cylinder?

__Solution guide:__

Looking at the figure, we see that Figure A and Figure E are cylinders.

Lesson 2 Textbook page 126

Which of the following objects is spherical?

__Solution guide:__

Looking at the figure, we see that the ping pong ball and the marble are spherical in shape.

Lesson 3 Textbook page 126

Name some objects of the form:

a) Cylindrical; b) Spherical.

__Solution guide:__

a) Some cylindrical objects are: Milk cartons, sewer pipes, water tanks, soft drinks cans…

b) Some spherical objects are: soccer ball, ping pong ball, marble, globe, snooker ball…

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