Final: Master of Angles

Part of the Angles section of Coddy's Geometry journey. Lesson 62 of 62.

The last challenge: an equal-type pair in the strip, expressions on both sides, nothing labeled but the algebra. Everything this section built, in one figure.

Challenge

Hard

Two parallel lines are cut by a transversal. The marked angles measure (5x - 40)° and (3x + 30)°.

$Two marked angles between parallel lines: 5x minus 40 degrees and 3x plus 30 degrees$

Find x.

Try it yourself

5x - 40 = 3x + 30

Solve for x

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Angles

2Straight Lines and Supplements

Angles on a Line Supplementary Angles Three Angles on a Line Write the Equation Recap: Along the Line

5Around a Point

Angles Around a Point The Missing Angle Equal Slices Four Angles, One Point Recap: The Full Turn

8Transversal Problems

Both Angles Labeled Verticals Meet Parallels From Figure to Equation Alternate with Algebra Recap: Through the Strip

11The Exterior Angle

The Exterior Angle Using the Shortcut Two Roads, One Answer Exterior in the Wild Recap: Outside View

3Right Angles and Complements

Complementary Angles Finding the Complement Perpendicular Lines Equal Parts of a Corner Recap: The Right Corner

6The Angle Bisector

The Angle Bisector Bisected Expressions Bisecting a Straight Angle Recap: Split in Half

9Triangle Angle Sum

The 180 Rule Finding the Third Angle Two Unknown Angles Right Triangles Recap: The Budget

12Final Challenges

Final: The Angle Chase Final: Triangle Meets Line Final: The Full Round Final: Isosceles ChaseFinal: Master of Angles