Tolong jwab no 3-5, dan SoRe no 1-4, pakai cara trima ksih
kattriananda
3. sudut A + B+ C = 180° 60°+(2x-10)°+ (3x+5)° = 180 5x + 55 = 180 5x = 125 x = 25 sudut C = 3x + 5 = 3.25 + 5 = 80° 4. a. panjang CD = t L ∆ = ½ a.t 24 = ½ . 8.t 24 = 4t t = CD = 6 cm b. L ∆ ABC = ½ a.t= ½.26.6 = 78 cm² 5. s= √ 8² + 6² = √100 = 10 a. kell ABCD = 4s = 4. 10= 40 cm b. L ABCD = ½.D1.D2 = ½.12.16 = 96 cm²
60°+(2x-10)°+ (3x+5)° = 180
5x + 55 = 180
5x = 125
x = 25
sudut C = 3x + 5 = 3.25 + 5 = 80°
4. a. panjang CD = t
L ∆ = ½ a.t
24 = ½ . 8.t
24 = 4t
t = CD = 6 cm
b. L ∆ ABC = ½ a.t= ½.26.6 = 78 cm²
5. s= √ 8² + 6² = √100 = 10
a. kell ABCD = 4s = 4. 10= 40 cm
b. L ABCD = ½.D1.D2 = ½.12.16 = 96 cm²