M3 Proof Properties

Front

If ∠1 = ∠2 and ∠2 = ∠3, then ∠1 = ∠3. What property is this?

Back

Transitive Property of Equality

Front

If ∠A and ∠B are complementary, what is the relationship between their measures?

Back

m∠A + m∠B = 90°. This is the Definition of Complementary Angles.

Front

If ∠A = ∠B, what can we say about m∠A and m∠B when we subtract 90 from both?

Back

∠A - 90 = ∠B - 90. This is the Subtraction Property of Equality.

Front

Which postulate states that m∠ADB + m∠BDC = m∠ADC?

Back

Angle Addition Postulate.

Front

If a = b, what can we conclude if we multiply both sides by 8?

Back

8a = 8b. This is the Multiplication Property of Equality.

Front

What is the definition of complementary angles?

Back

Two angles are complementary if the sum of their measures is 90°.

Front

What does the Reflexive Property of Equality state?

Back

For any number a, a = a.

Front

What is the Addition Property of Equality?

Back

If a = b, then a + c = b + c for any number c.

Front

What is the Subtraction Property of Equality?

Back

If a = b, then a - c = b - c for any number c.

Front

What does the Symmetric Property of Equality state?

Back

If a = b, then b = a.