The equation: s

=

p

2

−

p

2

s

=

p

2

-

p

2

gives the number of handshakes,

s

,

s

,

that would take place when

p

p

people gather in a room and every person in the room shakes the hand of every other person exactly once.

If there are 153 unique handshakes in the room, how many people are there?

There are people in the room.

If you could answer these your a life saver

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

This circle is centered at the origin, and the length of its radius is 6. what is the circle's equation? a. x^2+y^2=36 b x^2+y^2=6 c x+y=36 d x^6+y^6=1