1. An indirect proof uses a temporary assumption that
the desired conclusion is false. By then showing that
this assumption leads to a logical impossibility, the
original statement is proven true by contradiction.

2. longer ST
larger F

3. CB
AB CD
longer

4. congruent B
Hinge Theorem

5. false
true
true
false

6. x is divisible by 6
x/6
x n 2
x n x 2 6n 3n 3n 2
x is odd
false
x is not divisible by 6

7. A B C 90 80
100 85 95
AB is longer
Car A, Car C, Car B
You can temporarily assume x = 3