There's 5 triangles but till 3 sides in each, in Hectagon is 8 sides and the 3 Decagons are still 10 sides on it.
A decagon has ten sides and a triangle has three, so 5 decagons and 4 triangles have (5*10)+(4*3) = 62 sides altogether.
There are 74 sides in all.
There are ten sides in a decagon and three sides in a triangle. So in 3 decagons and 5 triangles there are 3*10 + 5*3 = 30 + 15 = 45 sides altogether.
If the octagon is a regular octagon (all eight sides and all eight angles are equal), then it is a regular polygon. If it is not a regular octagon (i.e. if it is an irregular octagon) then is it an irregular polygon.
A decagon has ten sides and an octagon has eight, so in 3 decagons and 5 octagons there are (3*10)+(5*8) = 30 + 40 = 70 sides altogether.
A decagon has 10 sides and an octagon has 8. 5*8 + 5*10 = 90 sides
There are 6 triangles in an octagon
There are six triangles in an octagon. In any convex polygon, there are two less triangles than the number of sides. So a octagon which has 8 sides, contains 6 triangles.
In an octagon, there are 20 equilateral triangles. Each side of the octagon can form two equilateral triangles with the adjacent sides, resulting in 8 equilateral triangles. Additionally, the diagonals of the octagon can form 12 more equilateral triangles. Therefore, the total number of equilateral triangles in an octagon is 8 + 12 = 20.
Oh, dude, let me grab my calculator for this super intense math problem. So, a decagon has 10 sides, a heptagon has 7 sides, a nonagon has 9 sides, and an octagon has 8 sides. If we add them all up, we get 10 sides x 4 decagons + 7 sides x 5 heptagons + 9 sides x 5 nonagons + 8 sides x 1 octagon = a grand total of 116 sides. Math is fun, right?
Eight triangles of equal size form a regular octagon.
There are 6