tolong bantu darurat

ini. maaf kalo misalnya ada jawaban yang salah

14]
< ABD + < CBD = 180°
7x + 5x = 180
12x = 180
x = 180/12
x = 15

besar pelurus < ABD
= < CBD
= 5x
= 5(15)
= 75° (b)


15]
< SPR + < QPR = 90°
4x + 14x = 90
18x = 90
x = 90/18
x = 5

besar penyiku < SPR
= < QPR
= 14x
= 14(5)
= 70° (d)

16]
< EPF + < DPE + < CPD + < BPC = 180°
64 + 90 + x + x = 180
2x + 154 = 180
2x = 180 - 154
2x = 26
x = 26/2
x = 13

besar < EPC
= < DPE + < CPD
= 90 + 13
= 103° (c)

17]
< ABE + < EBD + < DBC = 180°
5x + 7x + 6x = 180
18x = 180
x = 180/18
x = 10

besar < ABD
= < ABE + < EBD
= 5x + 7x
= 12x
= 12(10)
= 120° (b)

18]
< PQR + < RQS = 90°
3x + 7x = 90
10x = 90
x = 90/10
x = 9

besar < PQR
= 3x
= 3(9)
= 27° (a)

19]
< CBD + < DBE = 90°
2x + 32 = 90
2x = 90 - 32
2x = 58
x = 58/2
x = 29° (a)

20]
2x + 9 + x = 90
3x + 9 = 90
3x = 90 - 9
3x = 81
x = 81/3
x = 27°

besar < KML
= 180° - (< LKM + < KLM)
= 180 - (90 + 27)
= 180 - 117
= 63° (d)