Meng CUTUMITUUT Statements
Reasons
Identify the missing parts in the proof.
Given: ZABC is a right angle.
DB bisects ZABC.
1. ZABC is it.
1. A
2. DB bisects ABC
2. given
Prove: mZCBD = 45°
A:
3. B
3. def. of rt 2
4. mzABD = m_CBD
4. def. of bis.
B:
C:
D:
5. m_ABD+mZCBD = 90°
5. C
6. m2CBD + m2CBD = 90°
6. subs. prop
7. D
7. add.
8. m2CBD = 45°
8. div. prop
Intro
Done