Question

Find the areas of the rectangles whose sides are :
(b) 12 m and 21 m
(c) 2 km and 3 km
(d) 2 m and 70 cm
(a) 3 cm and 4 cm
امل​

Answer 1

Answer:

252m²,6km²,14000cm²,12cm²

Step-by-step explanation:

12*21=252m²

2*3=6km²

200*70=14000cm²

3*4=12cm²

Answer 2

Answer:

In electronics and telecommunications a transmitter or radio transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna