PYRAMID
Definition Of Pyramid
A pyramid is a polyhedron with a polygonal base and triangles for sides.
Video Examples: PYRAMID MATHEMATICS: Calculating the SEKED
Example of Pyramid
A pyramid is named for the shape of its base.
Some of the polygonal pyramids are shown below.
Solved Example on Pyramid
Ques: How many triangular faces are there in a rectangular pyramid?
Choices:
A. 8
B. 5
C. 4
D. 9
Correct Answer: C
Solution:
Step 1: The base decides the shape of the Pyramid.
Step 2: The base of the Pyramid is a rectangle.
Step 3: There are 4 base edges in the Pyramid.
Step 4: The faces of the Pyramid joining the base edge to the vertex are the triangular faces of the Pyramid.
Step 5: So, the number of triangular faces is equal to the number of base edges of the Pyramid.
Step 6: So, there are 4 triangular faces in a rectangular Pyramid.
Quick Summary
- Pyramids have a polygonal base.
- The sides of a pyramid are triangular.
- Pyramids are named after the shape of their base (e.g., rectangular pyramid).
🍎 Teacher Insights
Use physical models of pyramids to help students visualize the shape and its properties. Emphasize the relationship between the base shape and the pyramid's name.🎓 Prerequisites
- Polygons
- Triangles
- Basic Geometric Shapes
Check Your Knowledge
Q1: How many triangular faces does a rectangular pyramid have?
Q2: What shape is the base of a triangular pyramid?
Frequently Asked Questions
Q: What is the difference between a pyramid and a prism?
A: A pyramid has one base and triangular sides that meet at a vertex, while a prism has two parallel bases and rectangular sides.
Q: How do you name a pyramid?
A: A pyramid is named based on the shape of its base (e.g., a pyramid with a square base is a square pyramid).