tolong bantu ya, no. 23, 24, 26

no.23 @123 derajat
no.24 @16 derajat
no.26 @1/2 × alas × tinggi
1/2 × 10 cm × 5 cm
1/2 × 50 cm
25 cm

jawab
23.
3x - 48 = x + 22 (sehadap)
2x = 70
x = 35

<BCF = 180 - .(3x - 48)
= 180 - 3x + 48
= 228 - 3x
= 228 - 3(35)
= 228 - 105
= 123


24. sudut luar segitiga

2x -16 = (180-100) + 48
2x - 16 = 80 + 48
2x - 16 = 128
2x = 128+16 = 144
x= 72

26.
luas segitiga kiri --> L1 = 1/2 (10)(5+7) = 60
luas segitga tengah --> L2 = 1/2 (10)(5) = 25
Luas segitiga kanan --> L3 = 1/2 (10)(5+6+7) =  90

Luas yang tidak diarsir L4 = L1 + L3 - 2 L2
L4 = 60+90 - 2(25)
L4 = 150 - 50
L4 = 100