12. Given: BD 1 BC; LABD = ZDBE
Prove: LABD and ZEBC are complementary
Statements
1. BD 1 BC
2. ZDBC is a right angle
3. m/DBC = 90°
4. m/DBE + m/EBC = m/DBC
5. m/DBE + m/EBC = 90°
6. LABD ZDBE
7. m/ABD = m/DBE
8. m/ABD + m/EBC = 90°
9. LABD and ZEBC are complementary
1.
2.
3.
4.
5.
6.
7.
8.
9.
A
Reasons
B
E
C