Jawaban:

bismillahirrohmanirrohim

Penjelasan dengan langkah-langkah:

1. L=80x60

= 4800 cm²

2. L=2500 cm²

AB= akar 2500

= 50 cm

3. L= ½ × a × t

= ½ × 30 × 40

= 600 cm²

4. L= a×t

= 10 × 8

= 80 m²

5. L= ½ × d1 × d2

= ½ × 24 × 10

= 120 cm²

6. L= ½ × d1 ×d2

= ½ × 21 × 16

= 168 cm²

7. L= ½ × d1 × d2

250= ½ × 20 × d2

250= 10 × d2

250/10=d2

25=d2 =>AC= 25 cm

8. L= ½ × (a+b) ×t

3060= ½ × (100+70) ×t

3060= ½ ×170t

3060= 85t

3060/85=t

36=t

9. L= phi r²

= 22/7 × 21× 21

= 1.386 m²

10. L= 1,54 dm²

L= 15400 cm²

L= phi r²

15400= 22/7 ×r²

15400÷ 22/7 =r²

100=r²

10=r

d= 2×r

d= 2×10

d=20 cm

mohon maaf jika ada kesalahan yang tidak disengaja