tolong no : 8,10,12 jwb yg bnr!!!!!!pakai cara!!!!!

8.
EB² = AC² + GH²
EB² = 15² + 20²
EB² = 225 + 400
EB² = 625
EB = √625
EB = 25 cm

jawaban D

10.
∠R = 180° - ∠P - ∠Q
      = 180 - (2x + 24) - (4x - 25)
      = 180 - 2x - 24 - 4x + 25
      = -6x + 181

∠M = 180° - ∠K - ∠L
       = 180 - (3x + 7) - (5x - 42)
       = 180 - 3x - 7 - 5x + 42
       = -8x + 215

∠R = ∠M
-6x + 181 = -8x + 215
-6x + 8x = 215 - 181
2x = 34
x = 17

∠R = -6x + 181 = -6(17) + 181 = -102 + 181 = 79°

jawaban C

12.
jawaban D, AD dan DE sama panjang