# modulus

• Sep 19th 2008, 02:05 AM
z1llch
modulus
there's three point on a graph.
pointA(6,4), point B(-k,2), point C(-5,4).
the question wants to find the area of the triangle formed by this three point and express it in terms of k.
thus,
area of the triangle formed = -11-4k
since area has to be positive, so i put modulus? = |-11-k| in order to get positive answer.

but |m|= +-m. true?

so, what is answer the area of the triangle? if i did not use modulus, area of the triangle might be negative. but if i use modulus,|m|= +-m.

confused! (Wondering)
• Sep 19th 2008, 08:45 AM
Moo
Quote:

Originally Posted by z1llch
there's three point on a graph.
pointA(6,4), point B(-k,2), point C(-5,4).
the question wants to find the area of the triangle formed by this three point and express it in terms of k.
thus,
area of the triangle formed = -11-4k
since area has to be positive, so i put modulus? = |-11-k| in order to get positive answer.

but |m|= +-m. true?

so, what is answer the area of the triangle? if i did not use modulus, area of the triangle might be negative. but if i use modulus,|m|= +-m.

confused! (Wondering)