Area of the right triangle = 12 × (base × height) unit2
(i) b = 20 cm
h = 40 cm
Area = 1/2 (b × h) cm2 = 1/2 × 20 × 40 = 400 cm2
A = 400 cm2
(ii) b = 5 feet
Area = 1/2 × b × h unit2
= 20 = 1/2 × 5 × h sq. feet
(20×2)/5 = h
h = 8 feet
(iii) Area = 1/2 × (base × height) unit2
24 = 1/2 × b × 12 m2
base = (24×2)/12 m = 4 m
Base = 4m
Tabulating the unknown values
