Question

please solve 3 and 4th sums. Thanq in advance

Answer 1

3.

∠ABC = ∠DEF    

∴ x = 75°

ACB = ∠DFE

∴ y = 45°

z  = 180 -  (75 + 45) = 60°

4.  

AD is common and AD is perpenticular BC

∠ADB = ∠ADC = 90°

x = 180 - (90 + 35) = 55°