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Penjelasan dengan langkah-langkah:
1) A= AB = BC= 4 cm
B= AB= BC=4cm
AC² = 4²+4²
AC²= 16+16
AC²= √32
AC²= √16×2
AC²= 4√2 cm
2) ∆ Abc siku-siku
sama kaki di-D
BD:AB= 1:√2
BD= 4 cm
BD:BC = 1:2
∆:BC= 1:2
BC = 4×2
BC= 8 cm
3) BC per 60° =AB per 30°
BC per 1/2√3 = 4 per 1/2
BC= 4-1/2√3
1/2
=4√3 cm
AC= AB² + BC²
= 4²+(4√3²)
=16+48
=64
AC=√64 = 8 cm
4) COS 60° =NL/MN
NL=18 CM×1/2
TAN 60° = ml/Nl
ml=√3×9 cm= 9√3 cm
tan 30° = ML/KL
KL= 9√3 cm ×√3
KL= 27 cm
5) Cos 45° = RQ/PR
1/2√2= 8/PR
Pr= 1/2√2 ×8
=4√2
cos 60° =Ps/pr
1/2= ps/4√2
ps.1/2= 4√2
ps= 4√2
1/2
=2√2
=8
=4
[answer.2.content]
