We know that the area of parallelogram

= base x height

(a) Here, base = 20 cm and area = 246 cm^{2}

\Area of parallelogram = base x height

⇒ 246 = 20 x height

⇒ height = 246/20

= 12.3 cm

(b) Here, height = 15 cm and area = 154.5 cm^{2}

\ Area of parallelogram = base x height

⇒ 154.5 = base x 15

⇒ base = 154.5/15

= 10.3 cm

(c) Here, height = 8.4 cm and area = 48.72 cm^{2}

\ Area of parallelogram = base x height

⇒ 48.72 = base x 8.4

⇒ base =48.72/8.4

= 5.8 cm

(d) Here, base = 15.6 cm and area = 16.38 cm^{2}

\Area of parallelogram = base x height

⇒ 16.38 = 15.6 x height

⇒ height = 16.38/15.6

= 1.05 cm

Thus, the missing values are:

S. No. | Base | Height | Area of the parallelogram |

a. | 20 cm | **12.3** | 246 cm^{2 } |

b. | **10.3cm** | 15 cm | 154.5 cm^{2} |

c. | **5.8cm** | 84 cm | 48.72 cm^{2} |

d. | 15.6cm | **1.05** | 16.38 cm^{2} |