Geometry

Area of Triangles

Area of Triangles - Heron's Formula

         

What is the area of a triangle with side lengths 9,12,9,12, and 15?15?

What is the area of a triangle with side lengths 13,14,13, 14, and 15?15?

What is the area of a triangle with side lengths 9,11,9, 11, and 10?10?

A triangle has perimeter 14 and area 214.2\sqrt{14}. If the shortest side has length 3, find the positive difference between the lengths of other two sides. Give your answer to 3 decimal places.

What is the area of a triangle with side lengths 3,5,3,5, and 7?7?

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