Question

13. How many diagonals does a
triangle have?

1,
2,
4
​

Answer 1

Answer:

a triangle has 3(3−3)/2 = 3×0/2 = 0 diagonals.

Please mark as brainliest:-

Answer 2

Answer:

Dear mate,

A triangle has zero diagonals.

Step-by-step explanation:

Need proof:-

Here it is ........

Number of diagonals of a polygon is n(n-3)/2.

Where n is the number of sides of that polygon.

Triangle has 3 sides.

So the number of diagonals of triangle is,3(3–3)/2 = 0

Finally we can say triangle has no diagonal.

Hope this will help you to some extent.

please try to mark it as brainliest......