Tolong dibantu kerjakan segera ya trmksh
Jawab:
1. s = 12 cm
2. 44 cm²
3. x = 80°
4. ∠RPQ = 56°
5. 90 cm
6. 96 cm²
Penjelasan dengan langkah-langkah:
1. L = s²
144 = s²
s = √144
s = 12 cm
2. a. 2 (p x l)= 2 (2 x 6) = 2 12 = 24
b. p x l = 2 x 10 = 20
24 + 20 = 44 cm²
3. Karena segitiga sama kaki, maka:
180 = x + 2.50
180 = x + 100
x = 80°
4. ∠RQP = 180 - 112 = 68°
Karena segitiga sama kaki, maka sudut ∠RPQ = ∠QRP
180 = ∠RQP + ∠RPQ + ∠QRP
180 = 68 + 2∠RPQ
112 = 2∠RPQ
∠RPQ = 56°
5. k Ξ = s + s + s = 3s
= 30 . 3 = 90 cm
6. L Ξ = 1/2 a t
= 1/2 16 12
= 96 cm²
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