Question

BANTUUUUUU CUMA 4 SOAL AJA​

Answer 1

Penyelesaian:

5.)

65²=(12a)²+(5a)²

65²=144a²+25a²

65=√(169a²)

65=13a

a=5cm

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K=12(5)+5(5)+65

K=60+25+65

K=60+90

K=150cm

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6.)r=28cm

a.)

45°/360°×Πr²

=1/8×22/7×28×28

=1/8×22×4×28

=1/8×2.464

=308cm²

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b.)45°/360°×2Πr

=1/8×2×22/7×28

=1/8×44×4

=1/2×44

=22cm

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7.)V=La×t

V=p.l×t

V=12.8×10

V=96×10

V=960cm³