Question

MATEMATIKA KELAS 9 NOMOR 3 DAN 4 (A DAN B) SAJA MOHON DIJAWAB BAGI YANG MENGERTI :) please... udah 11x nanya gaada yang jawab

Answer 1

NO, 3
a)  ΔRTS ~ Δ RQP
<R = < R
<T = < P
maka  <S = < Q
dan  kedua nya sebangun

b)
ST/RS = PQ/QR
ST /6 = 14/8
ST = 6(14)/(8)= 10,5

PR/QR = RT /RS
PR/12 = 4 /6
PR = 4/6 x 12 = 8

SP = PR - SR
SP = 8 - 6
SP = 2

4) ABE  sebangun DCE
<A = < D
<B = < C
<E = < E

AE/AB = DE/DC 
6/ 4,5 = 2x/(x+1)
6(x+1)  = 9x
6x + 6 = 9x
6x -9x = - 6
- 3x = - 6 ---> x = 3

BE = 3x - 1 = 3(3) - 1= 8

CE/DE = BE/AE
CE / 2x = (3x -1) / 6
CE = (2x)(3x-1) /6 --> x = 3
CE = (6)(8)/(6) =  8