Help with my MATH PROBLEM

i know theres another thread about math but im worry that you wont see my problem :-[
ok heres the story i wanna learn geometry but my teacher is not kinda good in teaching stuffs and too make matters worst he(yes he's a guy mates!) always gives out assignments before discussing them to us. if you have a kind heart please answer these queries and kinda discuss how'd you got them.. :D

LEGEND
L=angle,m=measurement
ok here it goes
Use the figure above to find the measures of the indicated angles
1.mLR=40,mLQ=60 mL1=?
mL2=?2.mL2=50,mLQ=70 mL1=?
mLR?3.mLR=75, mLQ=35 mL1=?
mL2=?4.mL1=133,mLQ=48 mLR?
mL2=?
well thats all hope you like a little brain teaser
admins and mods pls dont pwn me if i made a flaw in this forum thx ;D

The angle sum of a triangle is 180 degrees, which means that the three angles inside the triangle (ie mLR, mLQ and mLP) add up to 180.A straight line (ie QP->) is also 180 degrees, which mean that 2 and 1 add to 180.With those two rules in mind, this should be easy stuff.

1. mR + mQ = 100
180 = 100 + x
x = 180 - 100
x = 80x is 2, 180 - x = (1)1 = 100, 2 = 80mQPR = 180, the angles of a triangle total up to 180
if you're missing one angle, subtract the total of the 2 given angles from 180 to find the missing angleya get it?

thx for the great help
;D ;D ;D

http://en.wikipedia.org/wiki/Exterior_angle_theorem"The exterior angle theorem is a theorem in elementary geometry which states that the exterior angle of a triangle (d) is equal to the sum of the two remote interior angles (a and c)."Therefore, mLR + mLQ = mL1.180 - mL1 = mL2.

Born2killxhttp://en.wikipedia.org/wiki/Exterior_angle_theorem"The exterior angle theorem is a theorem in elementary geometry which states that the exterior angle of a triangle (d) is equal to the sum of the two remote interior angles (a and c).Therefore, mLR + mLQ = mL1.180 - mL1 = mL2.

wow, never thought of working it out like that o_o

lol srsly i nvr knew u could sum it up to that 0.0