Jawaban : Dik: segitiga a

a = x cm

b = 2x cm

c = 9 cm

K = 30 cm

Dit:

Berapa nilai x?

Jawab:

K= a + b + c

30 = x + 2x + 9

30 = 3x + 9

30 – 9 = 3x

21 = 3x

7 = x

Dik: segitiga b

a = 12cm

b = 2p cm

c = 3p cm

K = 52 cm

Dit:

Berapa nilai p?

Jawab:

K = a + b + c

52 = 12 + 2p + 3p

52 = 12 + 5p

52 – 12 = 5p

40 = 5p

8 =p