Menu
CoddyMath
START LEARNING
flag En iconEnglishdown icon

Final: A Plot of Land

Part of the Triangles Without Right Angles section of Coddy's Trigonometry journey. Lesson 42 of 44.

A triangular plot of land has an area of 60 m². Two of its edges are 15 m and 11 m long, and the surveyor wants the angle between them.

challenge icon

Challenge

A triangular plot of land has an area of 60 m². Two of its edges are 15 m and 11 m long, and the surveyor wants the angle between them.

Find every possible angle θ between those two edges, to two decimal places, and press Check.

Try it yourself

Use the figure to find theta

Use the figure to find theta

quiz iconTest yourself

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

All lessons in Triangles Without Right Angles

1Across the Lake

Across the LakeSines Past 90°Cosines Past 90°Recap: Across the River

4Law of Cosines: SAS

The Law of CosinesAn Obtuse Angle BetweenThrough the HillA Hooked DriveRecap: Two Sides, One Angle

7Area of a Triangle

Area With a SineArea With an Obtuse AngleWorking BackwardsThe Angle From the AreaHeron's FormulaRecap: A Garden Bed

2Law of Sines: AAS and ASA

Why the Law of Sines HoldsPair Side With AngleThe Third Angle FirstTwo Coast StationsRecap: Law of Sines

5Law of Cosines: SSS

Three Sides, One AngleThe Largest AngleA Triangular FieldRecap: Three Sides

8Bearings and Navigation

Reading BearingsTwo Ships From PortTurning Off CourseFinding a Course AngleRecap: Ships at Sea

3The Ambiguous Case

Finding an AngleTwo TrianglesThe Height TestAn Obtuse Given AngleRadio CoverageRecap: How Many Triangles?

6Which Law to Use

Sines or Cosines?Not BetweenThree TownsRecap: Pick the Law

9Final Challenges

Final: Across the CanyonFinal: Every TriangleFinal: A Plot of LandFinal: Ship and PlaneFinal: The Largest Angle