Question

Tolong nomor 76 dong

Answer 1

Luas ABC = 1/2 *L.ABCD = 1/2 * 672 = 336
1/2 * AC * BE = 336
1/2 * 42 * BE = 336
21 BE = 336
BE = 336/21 = 16

sgitiga siku-siku ABE, berlaku :
AE^2 = 34² - 16² = (34 + 16)(34 - 16) = 50(18) = 900
AE = 30

CE = AC - AE = 42 - 30 = 12