no, these are the first 20 triangle numbers:
1 3 6 10 15 21 28 36 45 55
66 78 91 105 120 136 153 171 190 210
45
36 is a triangle number (1+2+3+4+5+6+8+9), a square (6*6) and an even number.
The triangle with sides measuring 9 inches, 9 inches, and 9 inches is an equilateral triangle.
Can 9, 8, and 17 for a triangle?
9
9 A triangle has three sides times by three = 9
36
45
45, 153, 171, 351...
36 is a triangle number (1+2+3+4+5+6+8+9), a square (6*6) and an even number.
The triangle with sides measuring 9 inches, 9 inches, and 9 inches is an equilateral triangle.
It is 9
Can 9, 8, and 17 for a triangle?
9
A triangular prism has 5 faces, 9 edges and 6 vertices
either prime, pentagonal, square or triangle. work it out for yourself.
An equilateral triangle has three sides of equal length.