Lesson Example Discussion Quiz: Class Homework |
Lesson |
Title: Surface Area of Pyramid |
Grade: 4-a Lesson: S3-L6 |
Explanation: Hello students, let us learn a new topic in geometry today with definitions, concepts, examples, and worksheets included. |
Lesson:
Definition: Pyramid |
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A pyramid is a three-dimensional geometric shape that has a polygon as its base and triangular faces that meet at a common point called the apex or vertex. The base can be any polygon, such as a square, triangle, rectangle, pentagon, or hexagon. The lateral area of a pyramid is the sum of the areas of its lateral (or side) faces. The formulas for the lateral area and the total surface area of a pyramid: Lateral Surface Area of Regular Pyramid (LSA) = \$(½)"Pl" \$Square units Total Surface Area of Regular Pyramid (TSA) = \$(½)"Pl" + "B"\$Square units |
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Explanation: The image shows a square pyramid with a surface area of 80 sq.cm, side length (b) of 4 cm, and slant height (s) of 8 cm, calculated using the formula \$2"bs" + "b"^2\$. |
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