Triangle Basics and Classification

Front

Vertices of Triangle ABC

Back

In triangle ABC, vertices are A, B, C.

Front

Sides of Triangle ABC

Back

In triangle ABC, sides are AB, BC, CA.

Front

Angles of Triangle ABC

Back

In triangle ABC, angles are ∠ABC, ∠BCA, ∠CAB.

Front

Equilateral Triangle Definition

Back

All three sides are equal.

Front

Example of Isosceles Triangle

Back

Isosceles: Triangle GHI with GH = HI.

Front

Diagram of Scalene Triangle JKL

Back

Illustrates all sides of the triangle being unequal.

Front

Classifying Triangles by Angles: Obtuse

Back

Has one angle greater than 90°.

Front

Altitude

Back

A line segment drawn from a vertex perpendicular to the opposite side.

Front

Median

Back

A line segment connecting a vertex to the midpoint of the opposite side.

Front

Perpendicular Bisector

Back

A line that is perpendicular to a side and divides it into two equal parts.