Area of triangle given 3 equations of sides, without finding points of intersection
70697
Direct formula for area of a triangle formed by three lines, given their equations in the cartesian plane.
61952
Area of intersection using integration
132402
Find 2nd leg of right triangle with known leg and perimeter
154231
Solving trigonometric equations without a calculator or tables
62126
Constructing a triangle given 2 sides and the inscribed circle's radius
48477
Finding an equation of circle which passes through three points
24419
Why area of a triangle is negative based on naming order?
157477
Area of a quadrilateral proof
149188
Equation for the line of intersection between two planes
101476
If $A$, $B$ and $C$ are the angles of a triangle then find the value of $\Delta$
90557
Extracting intersection areas in R
147351
The expected area of a triangle formed by three points randomly chosen from the unit square
129161
The minimum perimeter and maximum height of a triangle under constraints
73867
Radius of circumscribed circle of triangle as function of the sides
8469
Dividing an equilateral triangle into N equal (possibly non-connected) parts
135662
Calculating 3d polygons' surface area using ArcGIS Desktop?
79292
How to calculate the intersection of two planes?