# Surface Area of a Cone

Students learn how to calculate the curved surface area of a cone and total surface area of a cone by considering the net shape of a sector and circle.  As learning progress they calculate the are of complex composite shapes involving cones.
##### Differentiated Learning Objectives
• All students should be able to calculate the curved surface area of a cone using the formula.
• Most students should be able to calculate the total surface area of a cone using Pythagoras’ Theorem to calculate the slant.
• Some students should be able to manipulate the formula for the area of a cone to calculate the radius, slant or perpendicular height.
SKU: 079

### Mr Mathematics Blog

#### Calculating a Reverse Percentage

How to teach calculating the original amount after a percentage change.

#### Two-Way Tables and Frequency Trees

Problem solving lesson on two-way tables and frequency trees.

#### Plotting Curved Graphs

Three typical exam questions to revise on plotting quadratic, cubic and reciprocal graphs.