Jawapan

2016-10-06T21:28:59+08:00
Sudut pqr tu 90°. lepastu boleh cari sudut yg lain. then cari diameter guna konsep triginometri. cari luas hemisfera tolak dgn luas segitiga
Thnks dapat dh :)
sama2 sis :)
2016-10-07T19:12:40+08:00
A semicircle = 1/2 × πr² = 1/2 × 22/7 × 7² = 77 cm²
A triangle = 2 × 1/2bt = 2 × 1/2 × 7 × 7 = 49 cm²

A shaded = A semicircle - A triangle = 77 - 49 = 28 cm²