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It is the sum of the areas of its four faces.

Q: What is the surface area of this triangular pyramid?

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the answer is 120

It will be: 4*30mm2 = 120mm2

Surface area of any pyramid is 1/2Pl + B; where P=perimeter of the base, l=slant height and B= Area of the base.

If its a triangular based pyramid (tetrahedron) then it will have 4 equilateral triangle faces and so find the area of one face and multiply it by 4 to give the total surface area.

4*50 = 200 cm2.

Related questions

It is 288 cm^2.

the answer is 120

Surface area of a triangular pyramid: SA = 1/2 as + 3/2 sl a = altitude of the base triangle s = side of the triangle l = slant height of the pyramid.

It will be: 4*30mm2 = 120mm2

False, the prism can be of any length.

If it is a 4 faced tetrahedron pyramid then its complete surface area is 4*80 =320 square centimetres

Surface area of any pyramid is 1/2Pl + B; where P=perimeter of the base, l=slant height and B= Area of the base.

total surface area is all of the area. ex. for a square pyramid it would be the area of the square on the bottom and the four triangle sides lateral surface area is all the surface area EXCEPT the base. ex. for a square pyramid it would be the area of the four sides of the pyramid. the bottom square is NOT included. for a triangular prism it would be the area of the three rectangle sides, NOT the two triangular sides

If its a triangular based pyramid (tetrahedron) then it will have 4 equilateral triangle faces and so find the area of one face and multiply it by 4 to give the total surface area.

4*50 = 200 cm2.

The first comprises one rectangular face and four triangular faces whereas the second has two triangular and three rectangular faces.

As stated, the question cannot be answered. The pyramid could be irregular so that its triangular faces have different areas. If it were a regular pyramid, then with a square base it has four triangular faces whose combined area is 189 - 49 = 140 cm2 So each triangular face has an area of 140/4 = 35 cm2