Triangle Area, Read This
The area of the triangle is the area of the region bounded by the triangle.
For more details, let's pay attention to the rectangle below. The area of rectangle ABCD is:
L = AB × BC
= a × t
= 6×3
= 18 unit area
Look at triangle ABD!
The area of triangle ABD
= area of rectangle ABCD
2
= a x t = 6 x 3
2 2
= 9 unit area.
So, the area of the triangle is: L = 1 2 × a × t a = base t = height The symbol for a triangle is: Δ (Δ read: "triangle")