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Learn how to calculate the area and perimeter of different types of triangles using formulas and examples. Find out the formulas for equilateral, isosceles, and scalene triangles, and the Pythagoras theorem for right triangles.
Learn how to find missing sides and angles of triangles using six different types of puzzles and three equations: Angles Add to 180°, Law of Sines, and Law of Cosines. See examples, tips, and links to more resources.
Learn about the properties, types and formulas of triangles, including angles, area and Pythagoras' theorem. Find printable sheets, examples and demonstrations of triangle geometry.
Learn the formulas for finding the sides and angles of triangles, and how to use them in different situations. Find links to lessons, worksheets, calculators and games on triangles and related topics.
Learn about the different types of triangles, how to identify their angles and sides, and how to calculate their perimeter and area. Find the formulas for equilateral, isosceles, scalene, acute, right and obtuse triangles, and see examples and interactive diagrams.
Learn about the properties of triangles, such as angle sum, triangle inequality, Pythagoras, and congruence. Find formulas for area, perimeter, and Heron's formula with examples and practice questions.
To solve a triangle is to find its unknown (or required) side lengths and angles using what is known about the triangle. Solving Triangles — Important Concepts.
