How many different sized triangles can be formed using 2 cm,3cm,4cm,5cm and 6cm rods?

Guest Apr 30, 2020

#1**+2 **

A triangle has to have the sum of the two smaller legs to be greater than the largest leg.

2x3x4

3x4x5

3x4x6

4x5x6

There are **4 triangles**.

**EDIT: Wrong Answer...CPhill has the right answer**.

HELPMEEEEEEEEEEEEE Apr 30, 2020

#2**+2 **

It could simply be C(5, 3) as we are choosing 3 rods from the 5 total, therefore resulting in 10.

But, 6 of these will be degenerates (i.e. the sum of the 2 smaller legs is less than the bigger leg).

So, there are **4**. Can someone verify this? :D

EDIT: Wrong Answer

CentsLord Apr 30, 2020