tolong di bantu ya bsk di kumpilin 23-29

23. A

24. K = 2 × (A + B)

= 2 × (34+26)

= 2 × 60

= 120 cm (C)


[tex]25. \: l \: = \pi \times {r}^{2} \\ \\ = \frac{22}{7} \times {14}^{2} \\ \\ = \frac{22}{7} \times 196 \\ \\ = 22 \times 28 \\ \\ = 616 \: cm \: (a)[/tex]
[tex]27. \: l = \frac{\pi \times {r}^{2} }{2} \\ \\ = \frac{3.14 \times {20}^{2} }{2} \\ \\ = \frac{3.14 \times 400}{2} \\ \\ = \frac{1.256}{2} \\ \\ = 628 \: {cm}^{2} (c)[/tex]


[tex]26. \: l \: = \frac{a + b}{2} \times t \\ \\ = \frac{28 + 36}{2} \times 20 \\ \\ = 64 \times 10 \\ \\ = 640 \: {cm}^{2} \: (c)[/tex]