Justification Using Properties of Equality and Congruence - mdk12
Justification Using Properties of Equality and Congruence - mdk12
Justification Using Properties of Equality and Congruence - mdk12
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13.<br />
<strong>Justification</strong> <strong>Using</strong> <strong>Properties</strong> <strong>of</strong> <strong>Equality</strong> <strong>and</strong> <strong>Congruence</strong> (Continued)<br />
Given: m ∠ 1 = 40<br />
m ∠ 2 = 40<br />
m ∠ 1 + m ∠ 3 = 80<br />
m ∠ 4 + m ∠ 2 = 80<br />
Conclusion: m ∠ 3 = m ∠ 4<br />
Statement<br />
Reason<br />
1. m ∠ 1 + m ∠ 3 = 80 1.<br />
2. m ∠ 1 = 40 2.<br />
3. m ∠ 3 = 40 3.<br />
4. m ∠ 4 + m ∠ 2 = 80 4.<br />
5. m ∠ 2 = 40 5.<br />
6. m ∠ 4 = 40 6.<br />
7. m ∠ 3 = m ∠ 4 7.<br />
14.<br />
Given: m ∠ 1 + m ∠ 2 = 180<br />
m ∠ 2 + m ∠ 3 = 180<br />
Conclusion: m ∠ 1 = m ∠ 3<br />
Statement<br />
Reason<br />
1. m ∠ 1 + m ∠ 2 = 180 1.<br />
2. m ∠ 2 + m ∠ 3 = 180 2.<br />
3. m ∠ 1 + m ∠ 2 = m ∠ 2 + m ∠ 3 3.<br />
4. m ∠ 2 = m ∠ 2 4.<br />
5. m ∠ 1 = m ∠ 3 5.<br />
Lesson Plan: Different Methods <strong>of</strong> Pro<strong>of</strong><br />
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