tolong bantu dg yyyyy
Penjelasan dengan langkah-langkah:
BANGUN DATAR
AD = √(12² + 5²)
AD = √(144 + 25)
AD = √169
AD = 13 cm
- Keliling = 4 × AD
- Keliling = 4 × 13
- Keliling = 52 cm
24) a = 39 cm
t = a + 1
t = 39 + 1
t = 40 cm
Luas = ½ × a × t
Luas = ½ × 39 × 40
Luas = 1.560
2
Luas = 780 cm²
25) ada 3 cara
26) ∆ sama kaki ABC dengan titik puncak B
< A = < C
< B = 37,5°
< A + < B + < C = 180°
2 × < A = 180° – < B
2 × < A = 180° – 37,5°
2 × < A = 142,5°
< A = < C = 142,5°
2
< A = < C = 71,25°
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