An equilateral triangleis a triangle with all three sides equal and all three angles equal to 60°. They are really the same formula, just with the sides and angle changed. The area is given by: where p is half the perimeter, or

Java program to calculate the area of a triangle when three sides are given or normal method.

Remember that the given angle must be between the two given sides.

To find the area of a triangle when all 3 sides of a triangle are given. A is the area, bis the baseof the triangle (usually the bottom side), and his the height(a straight perpendicular line drawn from the base to the highest point of the triangle). All three heights have the same length that may be calculated from: h△ = a * √3 / 2, where ais a side of the triangle In an equilateral triangle the altitudes, the angle bisectors, the perpendicular bisectors and the medians coincide. Solution: Area of triangle PQR = pr sin Q = sin 39˚ = 8.79 cm 2. Area = 12 ca sin B. It is simply half of b times h. Area = 12 bh (The Triangles page explains more).

The formula for the area of a triangle is side x height, as shown in the graph below: There are different starting measurements from which one can solve a triangle, calculate the length of a side and height to it, and finally calculate a triangle's area.

where a, b, and c are the lengths of the triangle’s sides and S is the triangle’s semiperimeter. Using trigonometry. Let a,b,c be the lengths of the sides of a triangle. To solve an SSS triangle: use The Law of Cosines first to calculate one of the angles ; then use The Law of Cosines again to find another angle; and finally use angles of a triangle add to 180° to find the last angle.

If two sides and an included angle are given for a triangle, we can find its area using the following formulas: where A, B, and C are the 3 angles of the triangle and a, b, and c are the lengths of the 3 sides opposite the 3 angles. Calculating the area of a triangle is quite simple if you know the basics of java programming. It is called "Heron's Formula" after Hero of Alexandria (see below)

It is for any shape triangle.

Area of a triangle is equal to half of the product of its base and height.

･ Area of quilateral triangle. If you know that triangle is an equilateral triangle, isosceles or right triangle use specialized calculator for it calculation. The most commonly used formula for the area of a triangle is. Enter the three known sides.

area(26,39,52) Area of Triangle Knowing all Sides : Sides: 26.000, 39.000, 52.000 Area : 490.9006 Area of Triangle given by its 3 Sides. Area of a triangle. Approach : Read three sides(a, b, c) of a triangle using input() or raw_input(). Now use Hero’s formula to calculate the area of a triangle with sides of length 5, 6, and 7. This Python program allows the user to enter three sides of the triangle. You made a rectangle that's twice as big as the triangle!

When a triangle is given with sides alone, then Heron’s formula is the most appropriate to use.

When we know the base and height it is easy.

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