Question

5. Find a and b in Fig. 10.83.
A
B 709
bD
70°
145°
C
Fig. 10.83​

Answer 1

Answer:

110degres is right for this question

Answer 2

70°, 145°

Step-by-step explanation:

∠BA=∠BC

∠C=∠A

∠A= 145°

∠B= 70° [vertically opp. angles]

∠B =∠D

∠D= 70°

∠A = 360°-215° = 145°

hence,

a= 145°

b=70°