Question

((Mohon Dibantu Guys PR MTK saya soalnya gk ngerti soalnya senin dikumpulkan))

Answer 1

1. a. pakai perbandingansudut BOC /  luas BOC = sudut AOB / luas AOB150 / 500 = 30 / x150 : 30 = 5 : 1500 : x  = 500/5 = 100x = 100
b. sudut AOB kan 30360/30 = 12 luas AOB = 100100 x 12 = 1200
c. luasnya kan 12001200 / 3.14 = 382√382 (kan radius pasti sama) = 19.5jadikan diamter19.5 x 2 = 3939x3.14 = 122.7
2. sudut BOC = 90 + 30 = 120pakai perbandingansudut AOB / luas AOB = sudut BOC / luas BOC30 / 80 = 120 / x30 : 120 = 1 : 480 x 4 = 320
3. a. 176 / 3.14 = 56 (diamter)56/2 = 28
b. pakai perbandingan 60 / 360 = x / 176176/6 = 29.3
c. cari luasnya dulu28 x 28 x 22/7 =2464terus pakai perbandingan60 / 360 = x / 2464x = 410.7
4. pakai perbandingansudut COD / sudut AOB = busur COD / busur AOB28/80 = x / 68x = 23.8
5. a. cari luasnya dulu28 x 28 x 22/7 = 2464pakai perbandingan54 / 360 = x / 2464x = 369.97
b. cari kelilingdiameter = 28 x 2 = 5656 x 22/7 = 176pakai perbandingan54 / 360 = x / 176x = 26.4