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LA=1/2ps

Q: When p is the perimeter of the base and s the slant height of a regular pyramid What is a valid formula for the lateral area?

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LA=1/2ps

Lateral Area=Perimeter of the base * height perimeter=20 height=6 so, Lateral Area=20 * 6 Lateral Area=120cm

False

An isosceles trapezium.

Pyramid (regular) Lateral area : pl/2, where l = slant height : p = base perimeter Total area : pl/2+B where B = Base area.

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LA = 1/2psnewtest3

LA=1/2ps

SA=BA+LA SA=BA+1/2ps

Lateral Area=Perimeter of the base * height perimeter=20 height=6 so, Lateral Area=20 * 6 Lateral Area=120cm

False

Yes.

An isosceles trapezium.

Pyramid (regular) Lateral area : pl/2, where l = slant height : p = base perimeter Total area : pl/2+B where B = Base area.

first tell me the formula

If it is a regular pyramid you need to find out the base perimeter, multiply it by the height of the sides (when considered as triangles) and divide by two. The height of the side can be found using Pythagoras's formula if you know the height of the pyramid and the length of a side. The side height of a pyramid is also known as the slanted height or L in a formula. Formula:permiter of base x L(side height) ( P of B)(L) p x L(slant) ----------------------------------------- = --------------------- 2 2 Good luck!

The volume of a regular pyramid is 1/3*area of the base*hight

The slant height doesn't help you get the answer. Apart from the perimeter, you would need SOME other information about the base; either the number of sides, or anything that can help you calculate the number of sides. For example, if the base is a regular pentagon, you divide the perimeter by 5, and then use the formula for a regular pentagon, to calculate the base.