Question

Given: AABC is a right triangle and ZDAB is a right angle.

Prove: LACB LDAC.
Note: quadrilateral properties are not permitted in this proof.
Step
1
try
Statement
AABC is a right triangle
LDAB is a right angle
Type of Statement
Reason
Given
A
B

Answer 1

See below.

Explanation:

3. <B is a right angle shown in figure

4. line AD is parallel to line BC Theorem: if 2 lines are perpendicular

to the same line, then they are

parallel

5. <ACB congr <DAC Theorem: if 2 parallel lines are cut

by a transversal, then alternate

interior angles are congruent