A) the perimeter of a rectangle of 70 cm, its length is 20 cm. Find the area of a rectangle. b) the area of a rectangle is 64 cm, its width is 4 cm. Find rectangle perimeter. help please.

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A) 1) 70-(20*2)=30:2=15 (cm) - rectangle width. 2) 20*15=300 (cm) - the area of a rectangle of Answer: 300 cm area of a rectangle. b) 1) 64:4=16 (cm) - rectangle length. 2) (16*2) (4*2) =40 (cm) - perimeter of a rectangle of Answer: 40 cm rectangle perimeter. A) 1) The RPR = (and + b) *2 70:2+35 35-20=15 (cm) - Vpr 2) 35*15=525 (cm2)-Spr b) 64:4=16 (cm) - length is (16+4)*2=40 (cm) - the RPR
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Answer add