11. K = 12 + 16 + 25
k = 53 cm
12. L = a × t /2
L = 15 × 12 /2
L = 15 × 6
L = 90 cm^2
13. K = 3 + 4 + 5
K = 12 cm
14. K = sisi 1 + sisi 2 + sisi 3
K = c + c + a
39 = 2c + 15
39 - 15 = 2c
24 = 2c
c = 24/2
c = 12 cm
15. L = a × t /2
L = 17 × 8 /2
L = 17 × 4
L = 68 cm^2
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11. K = 12 + 16 + 25
k = 53 cm
12. L = a × t /2
L = 15 × 12 /2
L = 15 × 6
L = 90 cm^2
13. K = 3 + 4 + 5
K = 12 cm
14. K = sisi 1 + sisi 2 + sisi 3
K = c + c + a
39 = 2c + 15
39 - 15 = 2c
24 = 2c
c = 24/2
c = 12 cm
15. L = a × t /2
L = 17 × 8 /2
L = 17 × 4
L = 68 cm^2
SEMOGA MEMBANTU!