Tolong dijawab pake cara, makasih ya kak :)

Mapel : Matematika
Bab : Teorema Phytagoras

A]
x = √20² - 12²
x = √400 - 144
x = √256
x = 16 cm

B]
a = √13² - 5²
a = √169 - 25
a = √144
a = 12 mm

x = √35² - 12²
x = √1225 + 144
x = √1.369
x = 37 mm