bantuin kak.........
1.
L tp = Jss × T : 2
480 = (16+24) × T : 2
480 = 40×T:2
480 = 20T
T = 480:20
= 24 cm
SEGITIGA CEB
CB² = CE²+EB²
26² = 24² + EB²
676 = 576 + EB²
676-576 = EB²
100 = EB²
10 = EB
L ABCD = JSS × T : 2
= (16+(24+10)) × T : 2
= (16+34) × 24 : 2
= 50 × 24 : 2
= 50×12
= 600CM²
2.
RUMUS KELILING JAJARGENJANG = d1×d2 : 2
AB = DC
2X-1 = 15
2X = 16
X = 8
2X-1
2(8)-1
16-1=15
AD= BC
AD = 2X+Y+2
= 2(8)+Y+2
= 18+Y
AD = BC
18+Y = 3Y+4
18-4 = 3Y-Y
14 = 2Y
Y = 7
JADI 18+Y
18+7 = 25
JADI 3Y+4
3(7)+4
21+4 = 25
KEL. = 2 ( AB + BC )
= 2 (25 + 15)
= 2 ( 40 )
= 80 cm
semoga membantu, tolong tandai sbgai BA
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