9
3 because equilateral triangles are triangles that have 3 congruent sides.
All triangles have 3 sides.
3*10 = 30 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.
Like all triangles an Isosceles triangle has three sides and three angles. However, in an Isosceles triangle , two of the three sides are the SAME length. Also in an Isosceles triangle, two of the angles of the three have the same degree value. Here are the names of different type of triangle. EQUILATERAL ; All sides the same length , all angles at 60 degrees. ISOSCELES ; As above RIGHT-ANGLED(90 DEGREE) One angle MUST be 90 degrees. SCALENE ; All three sides of different lengths and all three angles of different degree values. In all CASES the sum of the interior angles is ALWAYS 180 degrees.
All triangles have 3 sides and 3 vertices.
In common with all triangles it has 3 sides.
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.
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.