Jawab:
a. Keliling = 2p + 2l
= ( 2 x 10) + ( 2 x 5)
= 20 + 10
= 30
b. Luas = p x l
= 10 x 5
= 50
c. 100 = 2p + 2l
100 = 2p + ( 2 x 5 )
100 = 2p + 10
100 - 10 = 2p
90 = 2p
p = 90/2
p = 45
d. 80 = p x l
80 = p x 5
p = 80/5
p = 16
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Jawab:
a. Keliling = 2p + 2l
= ( 2 x 10) + ( 2 x 5)
= 20 + 10
= 30
b. Luas = p x l
= 10 x 5
= 50
c. 100 = 2p + 2l
100 = 2p + ( 2 x 5 )
100 = 2p + 10
100 - 10 = 2p
90 = 2p
p = 90/2
p = 45
d. 80 = p x l
80 = p x 5
p = 80/5
p = 16