Matematika matematika matematika matematika

Matematika matematika matematika matematika

Jawaban:

1. 9cm 4cm

$k = 9 + 9 + 5 + 5 \ = 28 : {cm}$

$l = frac{a times t}{2} \ = frac{9 times 4}{2} \ = 18 : {cm}^{2}$

2. 14cm 12cm

$k = 14 + 14 + 13 + 13 \ = 54 : cm$

$l = frac{a times t}{2} \ = frac{14 times 12}{2} \ = 84 : {cm}^{2}$

3. a t

$k = c + c + a + a \ = 2c + 2a$

$l = frac{a times t}{2}$