tolong di bantu yah yang pinter :)

7)
a. panjang busur besar PQ =
[tex]360 {}^{0} - 72 {}^{0} = 288 {}^{0} [/tex]
b. Luas juring POQ =
[tex] \frac{72 {}^{0} }{360 {}^{0} } \times \frac{22}{7} \times 14 \times 14 = 123.2 \: cm {}^{2} [/tex]

semoga membantu:))