Tolong ya nomor 24-25 (abc an nmr 25) a. 132 b. 116 c. 88 d. 44
AisyahW
No 25. --> Mencari tinggi trapesium --> Mencari sisi miring trapesium : L = a + b x t > 14 - 4 = 10,, 10 : 2 = 5 2 = 12² + 5² = 144 + 25 = √169 = 13 cm 108 = 4 + 14 x t 2 108 = 9t t = 12
--> mencari keliling trapesium : --> panjang kawat = 44 x 3 = 132 (A) 14 + 13 + 4 + 13 = 44 No. 24 tidak tau
--> Mencari tinggi trapesium --> Mencari sisi miring trapesium :
L = a + b x t > 14 - 4 = 10,, 10 : 2 = 5
2 = 12² + 5² = 144 + 25 = √169 = 13 cm
108 = 4 + 14 x t
2
108 = 9t
t = 12
--> mencari keliling trapesium : --> panjang kawat = 44 x 3 = 132 (A)
14 + 13 + 4 + 13 = 44
No. 24 tidak tau
BD =akar (12^2 + 12^2) = akar (144+144)
=12 akar 2
BD = 3. DE
12 akar 2 = 3. DE
DE = 12akar 2 /3 = 4akar 2
BE = BD - DE = 12 akar 2 -4 akar 2 = 8 akar 2
EF /DA= BE /BD
EF/12 = 8 akar 2/12 akar 2
EF = 8
BF /BA =BE /BD
BF /12 =8 akar 2/12 akar 2
BF = 8
L arsir = L persegi - L trapesium
= 12.12 - 1/2.8.(8+12)
=144 - 80
=64
25.
108 = 1/2. (14+4).t
108 = 9t
t= 108/9 = 12
sisi miring = akar ( 12^2 + 5^2)
= akar (144+25)
= akar 169
=13
Keliling = 4 + 14 + 13+ 13 = 44
panjang kawat = 3. Keliling = 3.44 = 132