Triangle ABC is an equilateral triangle. Segment AD measures 18 inches.
2 answers:
You might be interested in
If you look at the attached graphic, you will see that the altitude (or height) of an equilateral triangle is:
Height = side length * sq root (3) / 2
Area = side^2 * sq root (3) / 4
Height = side length * sq root (3) / 2
Area = side^2 * sq root (3) / 4
