Engineers Edge


Oblique Triangle Solutions Calculator & Equations

Mathematics Menu | Engineering Calculators
Triangle (Trigonometry) Solutions Calculators

This calculator will determine the unknown length of a given oblique triangle for an Obtuse or Acute triangle. Simply enter in the unknown value and and click "Update" button located at the bottom of the web page.

OBLIQUE TRIANGLE SOLUTIONS:   
Input:
Results:
a b c
LA LB LC Area
a c LB
b LA LC Area
a c LC
b LA LB Area
a LA LB
b c LC Area
c LA LC
a b LB Area
c LB LC
a b LA Area
Note: Input and results strictly adhere to
          side and angle nomenclature above.
Law of Sine's
a/SIN(LA) = b/SIN(LB) = c/SIN(LC)
Law of Cosines:
a2 = b2 + c2 - 2*b*c*COS(LA)
b2 = a2 + c2 - 2*a*c*COS(LB)
c2 = a2 + b2 - 2*a*b*COS(LC)
For Acute Angle: (all of following are satisfied)
a2 + b2 > c2  ,  b2 + c2 > a2  ,  and  a2 + c2 > b2
For Obtuse Angle: (only one of following is satisfied
either  a2 + b2 < c2  ,  or  b2 + c2 < a2  ,  or  a2 + c2 < b2
Area of Triangle:
Area = a*c*SIN(LB)/2 = b*c*SIN(LA)/2 = a*b*SIN(LC)/2

Contribute Article Spider Optimizer

© Copyright 2000 - 2017, by Engineers Edge, LLC www.engineersedge.com
All rights reserved
Disclaimer | Feedback | Advertising | Contact

Spider Optimizer

Home
Engineering Book Store
Engineering Forum
Excel App. Downloads
Online Books & Manuals
Engineering News
Engineering Videos
Engineering Calculators
Engineering Toolbox
Engineering Jobs
GD&T Training Geometric Dimensioning Tolerancing
DFM DFA Training
Training Online Engineering
Advertising Center


Copyright Notice

Publishing Program