Year 9 Maths

What does SAS stand for? Is it a similarity test or a congruency test or both?

• Side-Angle-SIde (Both)

• Side-IncludedAngle-SIde (Congruency)

• Side-Angle-SIde (Similarity)

• Side-IncludedAngle-SIde (Both)

"The sides and angles of congruent triangles are exactly the same size, but the sides in similar triangles are in ______."

When do we flip an inequality sign in an equation?

• When dividing either of the sides

• When adding a negative number

• When multiplying or dividing by a negative

• When we do the final step of the equation

Two angles are NOT equal if they are...

• corresponding (form an F)

• co-interior angles (form a C)

• alternate angles (form a Z)

• vertically opposite angles

Which angle is the included angle for sides A and B?

• Angle E

• Angle D

• Angle F

• Angle C

These two triangles have two equal sides and one matching angle. Are they congruent?

• Yes (SSA or ASS)

• Yes (SAS)

• No

• Yes (RHS)

Answer explanation

The angles that are equal on both triangles are not between the same sides. Look carefully at the diagram and tell me what you think

Which of the following is NOT a valid congruence criterion for triangles?

• ASA

• SAS

• SSA

• SSS

What happens to the solution of an inequality if you add the same number to both sides?

• The inequality remains unchanged

• The inequality sign flips

• The solution becomes invalid

• The inequality sign changes to an equals sign

Which pair of angles are always equal when two lines are crossed by a transversal?

• Supplementary angles

• Adjacent angles

• Alternate angles

• Co-interior angles

How do we find the gradient of a line?

• y₂/x₁

• √((x₂ - x₁)² + (y₂ - y₁)²)

• y₂ - y₁/x₂ - x₁

• y = mx + b