Geometry: Collinearity, Betweenness, and Assumptions (Level 4 of 4)

This video tutorial covers four examples involving angle measurements. It begins with solving for angle ABC using algebraic expressions and geometric relations. The second example involves finding angle ABD using a ratio in a right angle. The third example uses a 1:3:2 ratio to find angles in a straight angle. The final example involves solving a system of equations to determine angle measures. The video concludes with a preview of the next series on writing simple proofs.

How do you find the measures of angle 1, angle 2, and angle 3 given their algebraic expressions?

What method is used to solve the system of linear equations in the last example?

What is the final answer for the measures of angle 1, angle 2, and angle 3?