Can some one help me, l forgot how to do it

48 cm² and 28 cm

Step-by-step explanation:

The ratio of the sides 1 : 2 = 4 : 7

The ratio of the sides 2 : 1 = 7 : 4

The ratio of perimeters is the same as ratio of sides

let the perimeter of 2 be x , then

= ( cross- multiply )

4x = 112 ( divide both sides by 4 )

x = 28

Perimeter of fig. 2 is 28 cm

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Given ratio of sides = a : b , then

ratio of areas = a² : b²

Here ratio of sides = 4 : 7

ratio of areas = 4² : 7² = 16 : 49

let x be the area of fig. 1 and using proportion

= ( cross- multiply )

49x = 2352 ( divide both sides by 49 )

x = 48

area of fig. 1 is 48 cm²

65

step-by-step explanation:

answer:

a=9

step-by-step explanation: lmk if you need a explanation