How many different angles are formed when ten distinct rays are drawn in the interior of an angle? what is the formula?

66(n+2)(n+1)/2

Step-by-step explanation:

a) When 10 rays are added, there are a total of 12 rays, counting those that define the original angle. Any two will form an angle, so you're counting the number of ways that 12 rays can be chosen 2 at a time. That's ...

  12C2 = 12·11/2 = 66 . . . . angles can be formed, including the original

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b) As you can tell from the above, the number of angles for n added rays is ...

  (n+2)(n+1)/2 . . . . the number of ways 2 rays can be chosen from n+2 rays

Here, n is the number of rays drawn in the interior of the original angle. This number includes the original angle.

Dothlfjgzk kgxkgfupig

step-by-step explanation:

when the line is solid:

it's either < or >

when the line is dashed:

it's either < or >

this > inequality sign means:

greater thanmore thanaboveexceeds

this < inequality sign means:

less thanfewer thanbelow

this > inequality sign means:

greater than/equal tono less thanat leastminimum of

this < inequality sign means:

less than/equal tono more thanat mostmaximum of

about the problem:

since the line is solid, that means it's either < or >

srry i'm not done ! i'll