plis jawab dengan benar pake caranya

24 ) Luas
= ( 1/2 × 8 × 10 × 2 ) + ( 40 × 8 )
= 80 + 320
= 400 cm2

25 ) Luas arsir
= ( 21 × 28 ) - ( 1/2 × 1/4 × 22/7 × 21 × 21 )
= 588 - 173,25
= 414,75 cm2

26 ) Jari jari
= 9.856 ÷ 22/7
= 9.856 × 7/22
= 3.136
= √ 3.136
= 56 m

Bab Bangun Datar

Kelas  VI

 

Jawaban :

 

24. L1 = 40 x 8 = 320 cm

L2 = ½ x 2 x 8 x 10 = 80 cm

= 320 cm² + 80 cm²

= 400 cm²

 

Jawaban : D

 

25. L1 = 28 x 21 = 588 cm²

L2 = ½ x 22/7 x 10,5 x 10,5 = 173,25 cm²

= 588 cm² – 173,25 cm²

= 414,75 cm²

 

Jawaban : D

 

 

26. L  =  phi x r x r

9.856 m² = 22/7 x r x r

r = √9.856 : 22/7

r = 56 m

 Jawaban : A