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Q: Would all triangles with base of 7cm long have the area of 21cm2?
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Can the area of the base of a regular pyramid be greater than the lateral area?

I doubt it because no matter how big the base is, if you laid the triangles in to the position of the base (ex 4 triangles to a square base) they would have a larger area than the base shape


Is it true or false that two triangles that have the same base have the same area?

False. The equation for area of a triangle is 1/2 base x height. The height and the base would have to be the same for two triangles to have the same area.


Would all triangles with base 7 cm have area 21 cm square?

No. Base times half the altitude gives the area.


Why is that if 2 triangles have the same base they have the same area?

Only if the two triangles have the same base and height then they have the same area, because an area of a triangle OS the base times the height divided by two.


How do you do area of triangles?

area = 1/2 base x height


How do you find the area of triangles?

area = 1/2 base x height


Can two triangles that have the same base always have the same area?

no


How do you find the area of the triangles if you only have the base and the height?

area =1/2 base length x height


What is the formula for a triangular pyramid in surface area?

A=1/2bh The area of a triangle is 1/2bh. If the base of it is a triangle and all 4 of the triangles aren't the same, then you have to find the area of the base triangle and then the three other triangles (which should all have the same area). If all four of the triangles have the same area, then just find the area of one of the triangles and multiply that by four. A triangular pyramid that has four equal triangles is also called a tetrahedron.


How do you find surface area of an equilateral triangles?

Area = 0.5*base*perpendicular height


The area of a triangle is found by multiplying the length of its base by its height?

No, a triangles area is calculated from base x height / 2


Are two triangles congruent if they have same area?

Not necessarily. You find the area of a triangle with the formula 1/2*base*height=Area. Imagine two triangles, one with 3 inches for both the base and height, and one with 4.5 inches for the height and 2 inches for the base. Both of these triangles will have 9 sq. in. for their areas, but they are not congruent.