Lateral Surface Area of Regular Pyramid Calculator using Semi-perimeter

Use our online calculator to find the lateral surface area (LSA) of regular pyramid using the lateral edge, side of base and semi-perimeter. Lateral surface area is measured by using areas of sides of any three dimensional object. Lateral surface area of the regular pyramid is done by adding the areas of all the triangular faces excluding the area of the bases. Here the calculator is build to find the lateral surface area of the regular pyramid using semiperimeter.

Use our online calculator to find the lateral surface area (LSA) of regular pyramid using the lateral edge, side of base and semi-perimeter. Lateral surface area is measured by using areas of sides of any three dimensional object. Lateral surface area of the regular pyramid is done by adding the areas of all the triangular faces excluding the area of the bases. Here the calculator is build to find the lateral surface area of the regular pyramid using semiperimeter.

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Formula:

SL = Semiperimeter x (√ (b2 - (a2 / 4))) Where, SL= Lateral Surface Area b = Lateral Edge a = Side of Base

Example:

Find the LSA of regular pyramid with semiperimeter 8 cm, lateral edge is 10 cm and base length is 7 cm.

Solution:

SL = Semiperimeter x (√ (b2 - (a2 / 4)))
= 8 x (√ (102 - (72 / 4)))
= 74.94 cm2


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