The Angle Angle Side postulate (often abbreviated as AAS) states that if two angles and the non-included side of one triangle are congruent to two angles and the non-included side of another triangle, then these two triangles are congruent.
Archives: Glossary Terms
An acute angle measures less than 90 degrees.
For any circle, the angle formed between the tangent and the chord through the point of contact of the tangent is equal to the angle formed by the chord in the alternate segment.
A line segment from a triangle vertex and perpendicular to the opposite base.
The measure of the angle formed by two intersecting chords is half the sum of the measure of the arcs intercepted by the angle and its opposite angle.
The ring-shaped region bounded by two concentric circles.
The base of a polygon is the side from which the height is measured.
Line that divides something, such as an angle, in two equal parts.
The point of intersection of the three medians of a triangle. It divides each median in parts of ratio 1 : 2.
A line segment from a triangle vertex to the opposing side.