 First and Second Year of Secondary School ÍNDICE Introduction Objectives Solids of  revolution. - Cylinder, cone, sphere. Areas - The net of a cylinder - Calculate a cylinder area. - The net of a cone. - Calculate a cone area. - Sphere Area Formula. - Calculate a sphere area. Volumes - Cylinder volume. - Cone volume. - Sphere volume. Curiosities - Sphere and cylinder areas - Sections and volumes
Solids of revolution
INTRODUCTION

These activities are designed to be viewed on a 17-inch screen and with a resolution of 1024 x 768 pixels because some windows show measurements in centimetres and millimetres that, when viewed with another configuration, won't correspond with reality; and the size of some windows can even be too big.
Students should have a pencil and a piece of paper to do calculations and deductions of the formulas used in these activities.
After checking the activities, it is a good idea for students to share ideas.

OBJETIVOS
• To recognise the different solids of revolution in the objects in our surroundings.
• To know the net of the cylinder and of the cone.
• To deduce and know the cylinder, cone and sphere area formulae.
• To apply these formulae when calculating the areas of these solids.
• To deduce and know the cylinder, cone and sphere volume formulae.
• To apply these formulae when calculating the volumes of these solids.
• To get into the habit of writing down the corresponding measurement unit in the outcome of an exercise.

 Eduardo Barbero Corral Spanish Ministry of Education , Social Afairs and Sport. Year 2007 