Unit6 Vocab Flashcard

Front

What does the Triangle Midsegment Theorem state?

Back

The segment joining the midpoint of two sides of a triangle is parallel to the third side and half the length.

Front

What is the relationship between ΔABC and ΔFDE if translation and dilation take ΔABC onto ΔFDE?

Back

ΔABC and ΔFDE are similar to each other.

Front

What is an altitude in a triangle?

Back

An altitude is a line segment from a vertex to the opposite side that is perpendicular to that side.

Front

If segment A'B' is parallel to segment AB, what can be inferred about their lengths?

Back

The lengths of the segments can be compared based on their parallel nature.

Front

Which theorem states that if ∠A≅∠C and ∠DEA≅∠BEC, then ∆DEA≅∆BEC?

Back

Angle-Angle Triangle Similarity Theorem.

Front

What is the definition of congruent triangles?

Back

Triangles that are identical in shape and size, meaning all corresponding sides and angles are equal.

Front

What is the definition of similar triangles?

Back

Triangles that have the same shape but may differ in size; their corresponding angles are equal and their sides are in proportion.

Front

What does the Angle-Side-Angle (ASA) Triangle Congruence Theorem state?

Back

If two angles and the included side of one triangle are equal to two angles and the included side of another triangle, then the triangles are congruent.

Front

What is the Side-Angle-Side (SAS) Triangle Congruence Theorem?

Back

If two sides and the included angle of one triangle are equal to two sides and the included angle of another triangle, then the triangles are congruent.

Front

What is the Triangle Proportionality Theorem?

Back

If a line is drawn parallel to one side of a triangle, it divides the other two sides proportionally.