tolong ya nomor satu pakai cara teriam kasih

phytagoras
c² = a² + b²

1.
c² = 12² + 20²
c² = 144 + 400
c² = 544
c = 4√34

2.
6² = a² + 5²
a² = 6² - 5²
a² = 36 - 25
a² = 11
a = √11

3.
27² = a² + 18²
a² = 27² - 18²
a² = 729 - 324
a² = 405
a = 9√5

1.
a.
c = √b² + a²
c = √20² + 12²
c = √400 + 144
c = √544
c = 4√34

b.
a = √c² - b²
a = √6² - 5²
a = √36 - 25
a = √11

c.
a = √c² - b²
a = √27² - 18²
a = √729 - 324
a = √405
a = 3√45
a = 9√5

Maaf Kalau Salah