9
3 because equilateral triangles are triangles that have 3 congruent sides.
3*10 = 30 sides.
All triangles have 3 sides.
In common with all triangles it has 3 sides.
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.
A pentagon has 3 triangles and 5 sides
3 because equilateral triangles are triangles that have 3 congruent sides.
A triangle has three sides, so six triangles have 6 * 3 = 18 sides altogether.
All triangles have 3 sides.
3*10 = 30 sides.
All triangles have 3 sides and 3 vertices.
In common with all triangles it has 3 sides.
6 triangles is 18 and 3 squares is 12 18 +12 ------- 30
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.
By definition, all triangles have 3 sides.
Like all triangles it has 3 sides
The shapes that have 3 sides and 3 vertices are called triangles. Triangles are classified based on the lengths of their sides and the measures of their angles. The three most common types of triangles are equilateral triangles (all sides and angles are equal), isosceles triangles (two sides and two angles are equal), and scalene triangles (all sides and angles are different).