Given: ABCD is a rectangle.
Prove: ABCD has congruent diagonals.
B
C
A
D
Identify the steps that complete the proof.
O
◆
11
11
Statements
1. ABCD is a rectangle
2. draw AC and BD
3. BAD and CDA are right
angles
4. BAD = CDA
5. ABCD is a parallelogram
6. AB
7. AD
-
CD
AD
8. ABAD ADCB
9. BD AC
M
1. given
2. unique line postulate
3. def. of a rectangle
Reasons
4. all right angles are
congruent
5. def. of a rectangle
6:4
7. reflexive property
8.
9.4