a. 15 km
b. 3 : 4 : 5
Penjelasan dengan langkah-langkah:
a. sisi tegak (a)
a² = 25² - 20²
= 625 - 400
= 225
a = √225 = 15 km
b. perbandingannya
= 15km : 20 km : 25 km
= 3 : 4 : 5
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a. 15 km
b. 3 : 4 : 5
Penjelasan dengan langkah-langkah:
a. sisi tegak (a)
a² = 25² - 20²
= 625 - 400
= 225
a = √225 = 15 km
b. perbandingannya
= 15km : 20 km : 25 km
= 3 : 4 : 5