MATH CALCULATOR
Oblique Triangle Calculator
Calculate sides, angles, and area of an oblique triangle using our online tool.
What is the Oblique Triangle Calculator & How does it work?
An oblique triangle is a triangle that does not have a right angle. To calculate its sides, angles, and area, we can use the Law of Sines, Law of Cosines, and Heron’s formula.The area of an oblique triangle can be calculated using Heron’s formula: Area = sqrt{s(s-a)(s-b)(s-c)}, where s is the semi-perimeter, s = (a + b + c) / 2.
a^2 = b^2 + c^2 – 2bc cos(A)
a = side opposite angle A, b and c are other sides, A is the angle between sides b and c.
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Frequently Asked Questions
How do I calculate the area of an oblique triangle?
Use Heron's formula: Area = √[s(s-a)(s-b)(s-c)], where s is the semi-perimeter (a+b+c)/2.
What is the Law of Cosines used for in an oblique triangle?
The Law of Cosines helps find a side length when you know two sides and the included angle, or an angle when you know all three sides.
Can I use this calculator if I only know two sides and one angle?
Yes, you can use the Law of Sines to find the other angles and then the Law of Cosines to find the remaining side.
What is the difference between a right triangle and an oblique triangle?
A right triangle has one 90-degree angle, while an oblique triangle does not have any right angles.
How do I find the missing side of an oblique triangle if I know two sides and the included angle?
Use the Law of Cosines: a² = b² + c² - 2bc cos(A), where A is the included angle.
Can this calculator handle all types of oblique triangles?
Yes, it can calculate sides, angles, and area for any oblique triangle using appropriate formulas.
What does Heron's formula require to calculate the area of an oblique triangle?
Heron's formula requires knowing all three side lengths (a, b, c) of the triangle.
Results are for informational purposes only and do not constitute professional advice.