Question

Tolong dong sama caranya

Answer 1

Verified answer

Jawab

Rusuk Kubus = a
diagonal sisi = a√2

P titik potong EG dan HF
T titik potong AC dan BD
PT = a
BT = 1/2 diagonal = 1/2 a√2
<(BGE dengan Alas )  =< PBT
tan <PBT = PT/BT
tan <PBT = a/ (1/2 a√2)  = 2/√2= √2

Answer 2

Verified answer

Kubus ABCD.EFGH

rusuk = a

P tengah EFGH
Q tengah ABCD

Perhatikan ΔPQB
sudut antara BEG dan alas = sudut PBQ = sudut α

tan α = PQ/BQ
tan α = a/(a√2 /2)
tan α = 2/√2
tan α = √2