Lecture on Angles and Triangles

These flashcards cover key concepts related to angles, triangles, and their relationships, as discussed in the lecture.

Linear Pair

A pair of adjacent angles whose non-common sides are opposite rays.

Complementary Angles

Two angles whose measures add up to 90 degrees.

Supplementary Angles

Two angles whose measures add up to 180 degrees.

Angle Addition Postulate

If point B is in the interior of angle AOC, then angle AOB + angle BOC = angle AOC.

Verwisselende Buitenhoek

The angle formed when a transversal crosses two parallel lines, resulting in alternating exterior angles.

Interior Angles of a Triangle

The sum of the interior angles of a triangle is always 180 degrees.

Exterior Angles of a Triangle

An exterior angle of a triangle is equal to the sum of the two opposite interior angles.

How do you calculate the measure of an angle in a triangle if you know two angles?

Subtract the sum of the two known angles from 180 degrees.