the number of way the letters of the word triangle to be arranged so t...
Arranging the letters of the word "triangle" with the word "angle" always present
There are a few steps we can take to solve this problem:
Step 1: Count the total number of ways to arrange the letters of "triangle"
The word "triangle" has 8 letters, so we can arrange them in 8! = 40,320 ways.
Step 2: Count the number of ways the word "angle" can appear in the arrangement
The word "angle" has 5 letters, so we can think of it as a block that we need to insert into our arrangement of "triangle".
In order for "angle" to be present, we need to choose a position for the block of letters "angle". We have 6 positions to choose from:
1. _ _ _ _ _ _ _
2. _ _ _ _ _ _ _
3. _ _ _ _ _ _ _
4. _ _ _ _ _ _ _
5. _ _ _ _ _ _ _
6. _ _ _ _ _ _ _
Once we have chosen a position for the block of letters "angle", we need to arrange the remaining 3 letters of "triangle" around it. We can arrange these 3 letters in 3! = 6 ways.
Therefore, there are 6 * 6 = 36 ways to arrange the letters of "triangle" with the word "angle" always present.
Step 3: Subtract the number of arrangements without "angle"
In order to get the number of arrangements with "angle" always present, we need to subtract the number of arrangements without "angle".
The number of arrangements without "angle" is simply the total number of arrangements of "triangle" minus the number of arrangements with "angle" present:
40,320 - 36 = 40,284
Final answer
Therefore, the number of ways to arrange the letters of "triangle" with the word "angle" always present is 36, and the number of ways to arrange the letters without "angle" is 40,284.