Area of △ABC=12×Base×Height\triangle ABC=\frac{1}{2}\times Base \times Height△ABC=21×Base×Height
=12×BC×AD=\frac{1}{2}\times BC\times AD=21×BC×AD
12×9×6=27 cm2\frac{1}{2}\times 9\times 6=27\;cm^221×9×6=27cm2
Area of △ABC=12×AB×CE\triangle ABC = \frac{1}{2}\times AB\times CE△ABC=21×AB×CE
27=12×7.5×CE27=\frac{1}{2}\times7.5\times CE27=21×7.5×CE
CE=7.2 cmCE =7.2\;cmCE=7.2cm