AAA Triangle Calculator
Check three angles form a triangle and find the side ratios and shape type. AAA fixes shape, not size.
Compare Your Options And Get Clear Answers
Check three angles form a triangle and find the side ratios and shape type. AAA fixes shape, not size.
AAA Triangle Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
AAA Quick Guide
Typical values for reference.
| A deg | B deg | C deg | Type |
|---|---|---|---|
| 60 | 60 | 60 | Acute |
| 90 | 60 | 30 | Right |
| 50 | 60 | 70 | Acute |
| 30 | 30 | 120 | Obtuse |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
AAA Triangle Calculator FAQ
Answers to common questions about this calculator.
Only ratios. You need one side length to set the size.
Yes, for a flat triangle.
Sides scale with the sine of the opposite angle.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.