Geometry Proofs help. I am having so much trouble with them.

Here are a few problems. Give me the reasons. This will make the difference to wether I pass the class for the six weeks. I am a few points away from passing.

1. Given: Q is the midpoint of PR, R is the midpoint of QS

Prove: PR = QS

*Statements*

a. Q is the midpoint of PR

b. PQ = QR

c. R is the midpoint of QS

d. QR = RS

e. PQ+QR=QR+RS

f. PQ+QR=PR, QR+RS=QS

g. PR=QS

2. Given: line segment AB =~ line segment DE, line segment BS =~ to line segment EF

Prove: line segment AC =~ line segment DF

It is 2 parallel lines. Points ABC are on one line and DEF are on the other.

*Statements*

a. line segment AB =~ line segment DE

b. AB = DE

c. line segment BS =~ line segment EF

d. BC = EF

e. AB+BC=DE+EF

f. AB+BC=AC, DE+EF=DF

g. AC = DF

h. line segment AC =~ line segment DF

3. Given AB perpendicular to BC, andgle 1 and angle 3 are complementary

Prove angle 2 =~ angle 3

*Statements*

a. AB perpendicular to BC

b. angle ABC = 90

c. angle 1 + angle 2 = angle ABC

d. angle 1 and andgle 2 form a right angle

e. angle 1 and angle 2 are complementary

f. angle 1 and angle 3 are complementary

g. angle 2 =~ angle 3