Assignment Active
Using Flowchart Proofs
Given: ABC is a right angle and _DEF is a right angle.
Prove: All right angles are congruent by showing that ABC = _DEF.
What are the missing reasons in the steps of the proof?
ZABC, ZDEF are
right angles
MZABC = 90°,
m_DEF = 90°
M_ABC = m_DEF
ZABCDEF
Given
A
B
С
A: ✓ definition of right angle
B: substitution property
Csymmetric property