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3025 = s²
s =√3025 = 55 cm
23) p : l = 3 : 2
K = 2 (p+l)
40 = 2(3x + 2x)
40 = 2 (5x)
40 = 10 x
x = 40/10 = 4
Lebar = 2x = 2 x 4 = 8 cm
24) t = √13² - 5²
= √169 - 25
= √144 = 12 cm
L = 10 + 20/2 x 12
= 30 x 6 = 180 cm²
25) s = √9² + 12²
=√81 + 144
= √225 = 15 cm
K = 4 x s
= 4 x 15 = 60 cm
26) K = 2 (p + l)
46/2 = p + l
23 = p + l
L = p x l
126 = p x l
p x l = 126
p + l = 23
14 9
Jadi panjang nya 14 cm dan lebar nya 9 cm
Selisih nya : 14 - 9 = 5 cm
Semoga bisa membantu.. :)