If ABCD is a square of side length 6 cm then the area of triangle ABC=……cm2
Substitute base=6 cm and height=6 cm: A=12×6×6=18cm2
Step 1 :△ABC is a right-angled triangle with legs AB and BC each of length 6 cm
Step 2 :Using formula for the area of a right-angled triangle: A=12×base×height
Step 3 :Substitute base=6 cm and height=6 cm: A=12×6×6=18cm2