27. that is, if the triangles are not connected.
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A pentagon has 3 triangles and 5 sides
A triangle has three sides, so six triangles have 6 * 3 = 18 sides altogether.
seven There are five triangles in a heptagon. In ay convex polygon the triangles are two less than the sides. So a heptagon which has 7 sides, contains 5 triangles. There are five triangles in a heptagon. In ay convex polygon the triangles are two less than the sides. So a heptagon which has 7 sides, contains 5 triangles.
There are two triangles with sides 9 x 12 x 15 meters. Each of the two triangles is inversely congruent (mirror image) to the other.
4 triangles