Question

how many diagonals does a triangle have?​

Answer 1

Answer:

Shape Names

Number of Vertices Number of Diag.

Triangle 3 0

Quadrilateral 4 2

Pentagon 5 5

Hexagon 6 9

Septagon 7 14

Octagon 8 20

Nonagon 9 27

Decagon 10. 35

Answer 2

Diagonals

DiagonalsTriangle 3. 0

0Quadrilateral 4 2

2Pentagon 5 5

5Hexagon 6 9

A triangle has no diagonals. A square has two diagonals of equal length, which intersect at the center of the square. The ratio of a diagonal to a side is. A regular pentagon has five diagonals all of the same length.