Answer:
Step-by-step explanation:
18 ∠CBJ ≅ ∠FHG {AC // HD , BG is transversal. Corresponding angles are equal}
19) ∠FJH ≅ ∠ BJA {Vertically opposite angles are equal}
20) m∠EFD = 75°
m∠JAB = m∠ EFD { AC // HD , AE is transversal. Corresponding angles are equal}
m∠JAB = 75°
21) m∠GHF = 130
m∠ JBC =m∠ GHF {Corresponding angles}
m∠JBC = 130
