Answer:
102° is the value of x
Explanation:
A = 78°
B = x
C = 78°
D = x
All angles of parallelogram = 360°
→ A + B + C + D = 360°
→ 78° + x + 78° + x = 360°
→ 156 °+ 2x = 360°
→ 2x = 360° - 156°
→ x = 204/2
→ [ x = 102° ]
Hence, the value of x is 102°.