Posted by **john** on Friday, April 10, 2009 at 2:18pm.

Which set can not reprsent the lengths of the sides of a triangle?

a){4,5,6} 2){5,5,11) 3){7,7,12} 4){8,8,8}

The coordinates of Point R are (-3,2) and the coordinates of point T are (4,1). What is the length of RT?

- math -
**Reiny**, Friday, April 10, 2009 at 4:52pm
to have a triangle, the sum of any two of the sides must be greater than the third side.

so look at 5,5,11, is 5+5 > 11 ?

for the second, use your "distance between two points" formula.

http://www.purplemath.com/modules/distform.htm

look at the example half way down the page, it fits your problem exactly.

## Answer This Question

## Related Questions

- math - Quadrilateral ABCD is a square. The coordinates of point A are (3,2), ...
- math help - 13. Write a translation rule that maps point D(7, –3) onto point D'(...
- 2 math questions - 13. Write a translation rule that maps point D(7, –3) onto ...
- Geometry - The endpoints of AB are A(2, 3) and B(8, 1). The perpendicular ...
- Coordinates Help asap? - Triangle ABC has coordinates A(1, 4); B(3, –2); and C(4...
- math - the diagram shows triangle ABC point c has coordinates (4,7) and the ...
- Geometry - line segment ab is the diameter of circle O whose center has ...
- Geometry - line segment ab is the diameter of circle O whose center has ...
- MATH - POINT A AND POINT B ARE 5 UNITS APART .THE COORDINATES OF POINT A ARE (3...
- math - 1) Write a translation rule that maps point D(7, –3) onto point D'(2, 5...

More Related Questions