Surface Area and Perimeter of Pyramids

This video tutorial explains how to calculate the surface area of pyramids, focusing on triangular and square pyramids. It covers the concept of a net, the use of slant height, and perimeter in calculations. The video provides detailed examples for both triangular and square pyramids, demonstrating the step-by-step process of finding their surface areas using geometric formulas.

What is the primary focus of the video tutorial?

• Exploring the interior angles of pyramids

• Learning about the history of pyramids

• Understanding the surface area of pyramids

• Calculating the volume of pyramids

What shape is the base of the triangular pyramid discussed?

• Circle

• Square

• Rectangle

• Triangle

Which mathematical rule is used to find the slant height in the video?

• Sine Rule

• Pythagorean Theorem

• 30-60-90 Triangle Rules

• Cosine Rule

What is the perimeter of the triangular base if each side is 6 units?

• 30 units

• 12 units

• 24 units

• 18 units

How is the lateral area of a triangular pyramid calculated?

• By subtracting the base area from the total surface area

• By adding the areas of the base and the apex

• By multiplying the base area by the height

• By summing the areas of the triangular faces

What is the formula for the area of a square?

• Length x Width

• Base x Height

• 1/2 x Base x Height

• Side x Side

What is the slant height of a square-based pyramid if the side is 4 and the slant height is calculated using 30-60-90 rules?

• 2

• 4

• 2√3

• 4√3

What is the perimeter of the square base if each side is 4 units?

• 20 units

• 8 units

• 12 units

• 16 units

How do you calculate the surface area of a square-based pyramid?

• Divide the lateral area by the base area

• Subtract the base area from the lateral area

• Multiply the base area by the height

• Add the lateral area and the base area

What is the final expression for the surface area of the square-based pyramid in the video?

• 16 + 16√3

• 32√3 + 16

• 16√3 + 16

• 32 + 16√3