Question

calcule a área dos tranquilos representados a seguir​

Answer 1

Oie, tudo bom?

a)

A = [b . h]/2

A = [4 . 4]/2

A = 16/2

A = 8 cm²

b)

b = 6/2 = 3

5² = h² + 3²

25 = h² + 9

- h² = 9 - 25

- h² = - 16 . (- 1)

h² = 16

h = √16

h = 4 cm

A = [b . h]/2

A = [6 . 4]/2

A = 24/2

A = 12 cm²

c)

A = [b . h]/2

A = [6,5 . 4,8]/2

A = 31,2/2

A = 15,6 cm²

d)

p = [a + b + c]/2

p = [7,5 + 6 + 4,5]/2

p = [12 + 6]/2

p = 18/2

p = 9

A = √[p . (p - a) . (p - b) . (p - c)]

A = √[9 . (9 - 7,5) . (9 - 6) . (9 - 4,5)]

A = √[9 . 1,5 . 3 . 4,5]

A = √[13,5 . 3 . 4,5]

A = √[40,5 . 4,5]

A = √182,25

A = √13,5²

A = 13,5 cm²

Att. NLE Top Shotta