Friday

July 25, 2014

July 25, 2014

Posted by **nicole** on Friday, April 20, 2012 at 1:52am.

- geometry -
**Steve**, Friday, April 20, 2012 at 5:07amsheesh! - draw one. There's only one diagonal, making 2 triangles.

a quad has only 4 points. pick a vertex. 2 of the other points form the adjoining side, leaving only 1 point left to form a diagonal.

- geometry -
**Reiny**, Friday, April 20, 2012 at 8:05amI looked at it a bit different.

Drawing the two diagonals, which intersect at one point, leaves us with 5 points, from which to choose any 3 to form a triangle

We can choose C(5,3) or 10 such triples,

BUT, two of the triplets are the 3 points that form the diagonals, they cannot form a triangle.

So number of triangles = 10-2 = 8

Count them to verify.

**Related Questions**

geometry - 1. An exterior angle of a regular polygon measures 30 degrees. What ...

Geometry - 1. How many sides does a regular polygon have if one exterior angle ...

math - louis drew all of the possible diagonals from one vertex of a regular ...

Geometry - The diagonals of rectangle ABCD are AC and BD. Hallie found that the ...

math - . Two groups of students are using a dynamic geometry software program to...

geometry - the length of 2 diagonals of a quadrilateral is 10cm and 24cm ...

math - Algebra For questions 1-5, find the value of the variable. 1. x = (1 ...

Geometry - Suppose that a given quadrilateral is a kite with no right angles. ...

Geometry - The coordinates of the vertices of quadrilateral ABCD are A (-8, 8...

math true/false - All diagonals from a single vertex of a hexagon are drawn. ...