# Q.4 Find the missing values:

(i) Area of the triangle = $$\frac{1}{2}$$× b × h
$$87cm^2$$ = $$\frac{1}{2}$$ × 15 × h
Or, h = $$\frac{87×2}{15}$$ = $$\frac{174}{15}$$ = 11.6cm
(ii) Area of the triangle = $$\frac{1}{2}$$× b × h
$$1256cm^2$$ = $$\frac{1}{2}$$ × b × 31.4
Or, b = $$\frac{1256×2}{31.4}$$ = 40×2 = 80 mm
(iii) Area of the triangle = $$\frac{1}{2}$$× b × h
$$170.5cm^2$$ = $$\frac{1}{2}$$ × 22 × h
Or, h = $$\frac{170.5×2}{22}$$ = 15.5 cm