sisi miring = √120² + 50² = √14400 + 2500 = √16900 = 130 m
Keliling trapesium = a + b + 2s = 190 + 90 + 2(130) = 280 + 260 = 540 m
Lintasan = Kn = 540 x 15 = 8100 m = 8,1 km (Jawban A) Nomor 2 SP = √24² +7² = √576 + 49 = √625 = 25 cm K = 2 x 25 + 2 x 12 = 74 cm (Jawaban C) Nomor 3 2x + 8x + 5x = 180 15x = 180 x = 180/15 x = 12
ABC = 5x = 5(12) = 60 (Jawbaan B) Nomor 4 4x + 46 = 5x + 25 46 - 25 = 5x - 4x 21 = x
a = (190 - 90)/2
a = 50
sisi miring = √120² + 50²
= √14400 + 2500
= √16900
= 130 m
Keliling trapesium = a + b + 2s
= 190 + 90 + 2(130)
= 280 + 260
= 540 m
Lintasan = Kn
= 540 x 15
= 8100 m
= 8,1 km (Jawban A)
Nomor 2
SP = √24² +7²
= √576 + 49
= √625
= 25 cm
K = 2 x 25 + 2 x 12
= 74 cm (Jawaban C)
Nomor 3
2x + 8x + 5x = 180
15x = 180
x = 180/15
x = 12
ABC = 5x
= 5(12)
= 60 (Jawbaan B)
Nomor 4
4x + 46 = 5x + 25
46 - 25 = 5x - 4x
21 = x
A₁ = 180 - 5x + 25
A₁ = 180 - 5(21) + 25
A₁ = 180 - 130
A₁ = 50 (Jawaban B)