Penjelasan dengan langkah-langkah:
nah, kita cari dulu sisi tegak pada segitiga siku sikunya
= √39² - 15²
= √1521 - 225
= √1296
= 36 cm
maka, kelilingnya
a.) keliling segitiga
= 39 + 15
= 54 cm
b.) keliling trapesium
= 15 + 15 + 36
= 30 + 36
= 66
keliling total
= 66 + 54
= 120 cm (d)
Cari alas jajargenjang (a)
a² = 39² - 15²
a² = 1.531 - 225
a² = 1.296
a = √1.296
a = 36 cm
Keliling
= 3(15 cm) + 36 cm + 39 cm
= 45 cm + 75 cm
= 120 cm
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Penjelasan dengan langkah-langkah:
nah, kita cari dulu sisi tegak pada segitiga siku sikunya
= √39² - 15²
= √1521 - 225
= √1296
= 36 cm
maka, kelilingnya
a.) keliling segitiga
= 39 + 15
= 54 cm
b.) keliling trapesium
= 15 + 15 + 36
= 30 + 36
= 66
keliling total
= 66 + 54
= 120 cm (d)
Cari alas jajargenjang (a)
a² = 39² - 15²
a² = 1.531 - 225
a² = 1.296
a = √1.296
a = 36 cm
Keliling
= 3(15 cm) + 36 cm + 39 cm
= 45 cm + 75 cm
= 120 cm