Triangles & Congruence Flashcards
7 cards from real Geometry practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Triangles & Congruence flashcards as text
An altitude of a triangle is a segment from a vertex that is:
Answer: Perpendicular to the opposite side
An altitude is perpendicular to the opposite side (or its extension).
If triangle ABC is congruent to triangle XYZ and angle B = 40 degrees, then angle Y equals:
Answer: 40 degrees
Corresponding angles of congruent triangles are equal, so angle Y = 40 degrees.
A triangle with all sides of different lengths is called:
Answer: Scalene
A scalene triangle has three sides of different lengths.
Which point is the intersection of a triangle's three medians?
Answer: Centroid
The three medians meet at the centroid, the triangle's balance point.
Two triangles cannot be proven congruent by which listed condition?
Answer: AAA
AAA only guarantees similarity, not congruence, since size can differ.
In an isosceles triangle, the altitude from the vertex angle also acts as the:
Answer: Perpendicular bisector of the base
In an isosceles triangle the vertex altitude bisects the base perpendicularly.
If a triangle has angles 100, 40, and 40 degrees, it is classified as:
Answer: Obtuse isosceles
The 100-degree angle makes it obtuse, and two equal 40-degree angles make it isosceles.