25 - 27 tolong dong.. besok dikumpulin :(

25. Luas = 3/4 .phi. r^2

= 3/4. 22/7 . 28. 28

= 3. 22. 4. 7

= 66. 28

= 1848 cm2 jawaban C

26. Luas = L1 + L2

=t/2 (a+b) + 1/2a. t

= 16/2 (30 +18) + 1/2. 18.14

= 8 (48) + 9.14

= 384 + 126

= 510 cm2 (jawaban D)

27. Luas = p x l

= 8 x 5

= 40 m2

Ditanam bunga

= 1- (3/5)

= 2/5
Luas ditanam bunga

= 2/5 × 40

= 16 m2 jawaban D