makaii cara k dri 13-17 ......

Please, let me answer your question :)
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r= 21 cm
Ditanya= L?

L= πr²
L= 22/7 x 21 x 21
L= 22 x 3 x 21
L= 66 x 21
L= 1386 cm²

Yg C jawabannya.

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a= 30 cm
t= 12 cm
Ditanya= L?

L= a x t
L= 30 x 12
L= 360 cm²

Yg C jawabannya.

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d= 28 cm > r= 28/2 = 14 cm
Ditanya= L?

L= πr²
L= 22/7 x 14 x 14
L= 22 x 2 x 14
L= 44 x 14
L= 616 cm²

Yg C jawabannya.

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Bangun= ¾ lingkaran
r= 10 cm
Ditanya= L?

L= ¾ x 3,14 x 10 x 10
L= ¾ x 3,14 x 100
L= 3 x 3,14 x 25
L= 75 x 3,14
L= 235,5 cm²

Yg B jawabannya.

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•Persegi Panjang
- p= 20 cm
- l= 15 cm

•Segitiga Siku2
- a= 20-10= 10 cm
- t= 18-15= 3 cm

Ditanya= L total?

LPP= p x l
LPP= 20 x 15
LPP= 300 cm²

LSS= ½ x a x t
LSS= ½ x 10 x 3
LSS= 5 x 3
LSS= 15 cm

L total= 300+15= 315 cm²

Yg B jawabannya.

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Hopefully this is the best for you :)

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