A triangle is a figure formed when three noncollinear points are connected by segments. Each pair of segments forms an angle of the triangle. The vertex of each angle is a vertex of the triangle.
The sum of the measures of the angles of a triangle is 180.
Area of a triangle
When you know the lenght of the base and the height, you can use the formula:
Area=·b·h, where b is the base and h is the height
|Find the area of an acute triangle with a base of 15 inches and a height of 6 inches.
Area=·(15 in)·(6 in)
Area of a triangle (Heron's Formula)
Heron's formula gives the area in terms of the three sides of the triangle:
Suppose we know the values of the three sides a, b
of the triangle.
is the semiperimeter of the triangle, that is, s
= , then:
|Find the area of triangle from a = 4, b = 6 and c = 4 using heron's formula.
s = = = 7
= = 7.94