Respuesta :

medbck

Answer:

6. 4.8m

7. a. 48 b. 31.4 c. 170

Step-by-step explanation:

6. 4.5^2 x 1.6^2 = c^2

   22.81 = c^2

   square root of 22.81 = 4.8

7.

a. 12^2 x 16^2 = c^2

   400 = c^2

   square root of 400 is 20, 20 + 12 + 16 = 48

b. 9^2 x b^2 = 13^2

   88 = b^2

   square root of 88 is 9.4, 9.4 + 9 + 13 = 31.4

c. 25^2 x b^2 = 65^2

   3600 = c^2

   square root of 3600 is 60, 60 + 60 + 25 + 25 = 170

Answer:

6) 7.2

(use pythagoras' theorem)

Step-by-step explanation:

7

a) The unknow side is 20

-> The perimeter is : 20 + 16 + 12 = 48 cm

b) The unknow side is 9.38

-> The perimeter is: 9 + 9.38 + 13 = 31.38 cm

c) The unknow side is 60

-> The perimeter is: 65 + 25 + 60 = 150 cm

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