# Triangle

Triangle KLM is given by plane coordinates of vertices: K[11, -10] L[10, 12] M[1, 3].

Calculate its area and its interior angles.

Calculate its area and its interior angles.

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**Math student**

I find it hard ... But I think I will get there. ... Slowly but surely ...

Tips to related online calculators

For Basic calculations in analytic geometry is helpful line slope calculator. From coordinates of two points in the plane it calculate slope, normal and parametric line equation(s), slope, directional angle, direction vector, the length of segment, intersections the coordinate axes etc.

Two vectors given by its magnitudes and by included angle can be added by our vector sum calculator.

Cosine rule uses trigonometric SAS triangle calculator.

See also our trigonometric triangle calculator.

Pythagorean theorem is the base for the right triangle calculator.

Two vectors given by its magnitudes and by included angle can be added by our vector sum calculator.

Cosine rule uses trigonometric SAS triangle calculator.

See also our trigonometric triangle calculator.

Pythagorean theorem is the base for the right triangle calculator.

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