Question

Tolong jawab pertanyaan dibawah ini no 1 sampai 4

Answer 1

1) 95+3x-5+x+10 = 180
95-5+10+3x+x = 180
100+4x = 180
4x = 180-100
4x = 80
x = 80/4 = 20˚

jadi, sudut BAC = 3x-5
= 3.20-5
= 60-5
= 55˚(C)

2) L = p.l
= 16.8
= 128 cm² (D)

3) L = 1/2.a.t
= 1/2.8.3
= 12 cm² (A)

4) sisi = K:4
= 52:4
= 13 cm
jadi, L = s²
= 13²
= 169 cm² (A)

Answer 2

1. 180⁰ - 95⁰ = 85⁰
3x -5 + x + 10 = 85⁰
4x + 5 = 85⁰
4x = 80
x = 20
sdt BAC = (3x - 5)
3 (20) - 5 = 60 - 5 = 55⁰ (C)

2. Luas persegi panjang = p × l = 16 × 8 = 128 cm² (D)

3. Luas segitiga = (alas × tinggi) ÷ 2 = (3 × 8) ÷ 2 = 12 cm (A)

4. Kll persegi = 4 × sisi
52 cm = 4 × sisi
52 cm ÷ 4 = sisi
13 cm = sisi
Luas persegi = sisi × sisi = 13 × 13 = 169 cm² (A)
Smoga bermanfaat.