A triangle is
a figure formed when three
noncollinear points are
connected by segments.
pair of segments forms an angle of the triangle. The vertex of
each angle is a vertex of the
The sum of the measures of the angles of a triangle
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.
·(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