tolong jawab pake cara
Jawab:
24.)
b. Busur.
25.)
b. 33 cm
Keliling = [tex]\frac{3}{4}[/tex] × 2 × Ο × r
= [tex]\frac{3}{4}[/tex] × 2 × [tex]\frac{22}{7}[/tex] × 7
= [tex]\frac{3}{4}[/tex] × 2 × 22 × 1
= [tex]\frac{3}{4}[/tex] × 44 cm
= 3 × 11
= 33 cm
25.)
a. 616 cm²
Luas = [tex]\frac{1}{4}[/tex] × Ο × r × r
= [tex]\frac{1}{4}[/tex] × [tex]\frac{22}{7}[/tex] × 28 × 28
= [tex]\frac{1}{4}[/tex] × 22 × 4 × 28
= 22 × 1 × 28
= 616 cm²
