suatu kubus berukuran 10 cm. tentukan a.diagonal ruang b. diagonal bidang

b. diagonal bidang = √rusuk²+rusuk² = √10²+10² = √100+100 = √200 = √100x2 = 10√2

a. diagonal ruang kubus = √diagonal bidang²+rusuk²) = √200+100 = √300 = √100x3 = 10√3

semoga membantu:)
maaf jikalau salah