PEMBAHASAN
Kesebangunan
2 bangun datar sebangun
• bentuk sama
• besar sudut yang bersesuaian, sama
• perbandingan sisi yang bersesuaian, sama
a.
Pasangan sudut yang sama besar :
∠A = ∠P
∠B = ∠Q
∠C = ∠R
∠D = ∠S
b.
Perbandingan sisi yang bersesuaian :
AB/PQ = BC/QR = CD/RS = AD/PS
c.
AD/PS = CD/RS
Panjang AD
= PS × CD/RS
= 4,5 × 2/3
= 9/3
= 3 cm
Panjang AB
= PQ × CD/RS
= 9 × 2/3
= 6 cm
Panjang QR
= BC × CD/RS
= 5 × 3/2
= 7,5 cm
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PEMBAHASAN
Kesebangunan
2 bangun datar sebangun
• bentuk sama
• besar sudut yang bersesuaian, sama
• perbandingan sisi yang bersesuaian, sama
a.
Pasangan sudut yang sama besar :
∠A = ∠P
∠B = ∠Q
∠C = ∠R
∠D = ∠S
b.
Perbandingan sisi yang bersesuaian :
AB/PQ = BC/QR = CD/RS = AD/PS
c.
AD/PS = CD/RS
Panjang AD
= PS × CD/RS
= 4,5 × 2/3
= 9/3
= 3 cm
Panjang AB
= PQ × CD/RS
= 9 × 2/3
= 6 cm
Panjang QR
= BC × CD/RS
= 5 × 3/2
= 7,5 cm