[b][color=#0000ff][size=150]In this image is Pelisor Castle (Built in 1899-1902), Sinaia, Romania[/size][/color][/b]
Triangle ABC is isosceles with AB=AC=9 and BC=12.[br]Find the area of ABC triangle.
you can use Heron'formula
The perimeter for the ABC triangle is:
If AF=FG=GC and DF||EG||BC find:[br]a) The area of AEG triangle.[br]b) The slope of the line AB.[br]c) Thea area of EGCB quadrilater.