Q: How many diagonals does a vertex have from a triangle?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

69

Consider the pentagon ABCDE. By drawing diagonals from B, we get: 1. Triangle ABE 2. Triangle BDE 3. Triangle BCD -Ashwin Hendre

A diagonal is normally defined as a straight line joining a vertex of a polygon with any vertex other than an adjoining vertex (lines joining a vertex to an adjoining vertex would simply be a side of the polygon). Since a triangle has only got adjoining vertices, it has no diagonals. Since there are no diagonals, they cannot bisect one another.

An n-gon has n(n-3)/2 total diagonals. You can draw n-3 diagonals from each vertex ( n>3) ( A triangle doesn't really have a diagonal) An alternative way of seeing this: from any vertex, you can draw a diagonal to any other vertex except itself and the immediate neighbour on either side (the latter would be sides of the n-gon). This gives n-3 diagonals.

a triangle has three diagonals as well as three sides

Related questions

69

The number of Diagonals in one vertex of a Triangle is 0 (zero)..

1 triangle is formed.

There are no 'diagonals' in a triangle. Each vertex is connected to both of the other vertices, by the sides.

how many diagonals from a vertex a heptagon have

Consider the pentagon ABCDE. By drawing diagonals from B, we get: 1. Triangle ABE 2. Triangle BDE 3. Triangle BCD -Ashwin Hendre

A diagonal is normally defined as a straight line joining a vertex of a polygon with any vertex other than an adjoining vertex (lines joining a vertex to an adjoining vertex would simply be a side of the polygon). Since a triangle has only got adjoining vertices, it has no diagonals. Since there are no diagonals, they cannot bisect one another.

There are 5 diagonals

An n-gon has n(n-3)/2 total diagonals. You can draw n-3 diagonals from each vertex ( n>3) ( A triangle doesn't really have a diagonal) An alternative way of seeing this: from any vertex, you can draw a diagonal to any other vertex except itself and the immediate neighbour on either side (the latter would be sides of the n-gon). This gives n-3 diagonals.

yes * * * * * No. In a polygon (a plane shape with sides which are straight lines), a diagonal is a line from one vertex to another provided it is not already a side of the polygon. In a triangle, the only lines which can join two vertices are sides of the triangle. Therefore they are not diagonals: that is, a triangle (right angled or not) cannot have diagonals.

If all of the diagonals are drawn from a vertex of an octagon, how many triangles are formed

fourteen. If you draw if diagonals from one vertex there are 14. fourteen. If you draw if diagonals from one vertex there are 14.