(A )Given length=13.5 m, Breadth=10.5 m

Every rectangle has two equal right triangles.

Area of each right triangle \(\displaystyle=\frac{{1}}{{2}}\times{13.5}\times{10.5}={70.875}{m}^{{2}}\)

(B) Given length=18 m , Breadth=8 m

Every rectangle has two equal right triangles.

Area of each right triangle \(\displaystyle=\frac{{1}}{{2}}\times{18}\times{8}={72}{m}^{{2}}\)

(C) Given length=1.5 m , Breadth=30 cm=30/100=0.3 mZSK

Every rectangle has two equal right triangles.

Area of each right triangle \(\displaystyle=\frac{{1}}{{2}}\times{1.5}\times{0.3}={0.225}{m}^{{2}}\)

Every rectangle has two equal right triangles.

Area of each right triangle \(\displaystyle=\frac{{1}}{{2}}\times{13.5}\times{10.5}={70.875}{m}^{{2}}\)

(B) Given length=18 m , Breadth=8 m

Every rectangle has two equal right triangles.

Area of each right triangle \(\displaystyle=\frac{{1}}{{2}}\times{18}\times{8}={72}{m}^{{2}}\)

(C) Given length=1.5 m , Breadth=30 cm=30/100=0.3 mZSK

Every rectangle has two equal right triangles.

Area of each right triangle \(\displaystyle=\frac{{1}}{{2}}\times{1.5}\times{0.3}={0.225}{m}^{{2}}\)