Q: How many lines of symetry does a equilateral triangle have?

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None

a scalene triangle has no lines of symmetry

If you're talking about convex polygons with equal sides (eg. equilateral triangles, squares, pentagons, hexagons, etc.), then the relationship is a very direct one. In those cases, there are as many lines of symmetry as there are points in the polygons. A triangle has three lines of symmetry, a square has four, a pentagon five, etc.

There is only one set of perpendicular lines in a right triangle; the horizontal line and the vertical line that make it 90 degrees.

Area of equilateral triangle = (b x h)/2 = 9√ 3 sq in For an equilateral triangle, b2 = h2 + (b/2)2 = h2 + b2/4 h2 = 3b2/4 : h = (b/2)√ 3 Substituting for h in the Area formula [b x (b/2)√ 3]/2 = 9√ 3 : b2/4 = 9 : b2 = 36 : b = 6 Therefore the perimeter measures 3 x 6 = 18"

Related questions

there r 3 lines of symmetry in a equilateral triangle

3

An equilateral triangle has 3 lines of symmetry whereas an isosceles triangle only has 1 line of symmetry and other triangles have no lines of symmetry.

3, one coming from each vortex (corner) going to the opposite side of the vortex

1

1

depends. If it is a right iscoceles, then it has only one. if it is a right equilateral, it will have three. If it is a right scalene, it will have none.

An equilateral triangle has 3 lines of symmetry.

An equilateral triangle has 3 lines of symmetry

usually none

There are a total of 3 lines of symmetry in an equilateral triangle

1 line of symetry