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= 22/7 × 7 × 7 × 1/2 = 77
= 22/7 × 7 × 7 × 1/2 = 77
= 308 + 77 - 77 = 308
= (Singkat) 308
- (Persegi) -1600 - 308 = 1292
Please jawaban terbaik yaa....
=(22/7 x 28 x1/2) + (22/7 x 14)
=44 + 44 =88 cm
2.b.rumus=1/2keliling lingkaran + sisanya
=(22/7 x 28 x 1/2) + (26 x 4)
=44 + 104=148 cm
3.a.keliling=14+14+14+(22/7 x 14 x 1/2)=64 cm
- luas=14 x 14 + 22/7 x 7 x 7 x 1/2=196 + 77=273 cm2
3.b.keliling=3,14 x 10 + 5 x 4=31,4 + 20=51,4
-luas=(10 x 10 -1/2 x 3,14 x 5 x 5) + (3,14 x 5 x 5)=60,75 + 78,5=139,25 cm2