tolong dibantu yah, nomor 35 pakai cara..

papan
d1 = 40
d2 = 2 x [√((25)² - (20)²)] = 2 x [√(625 - 400)] = 2 x [√225] = 2 x 15 = 30

luas
= luas papan - luas cermin
= 40 x 30/2 - 32 x 24/2
= 600 - 384
= 216 cm²

#maaf jika salah semoga membantu