Question

please solve my equation​

Answer 1

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In Fig. (v), 125° = a + c ….(i)

And 140° = a + b  …..(ii)

Adding, we get

a + c + a + b = 125° + 140°

⇒ a + a + b + c = 265°

But a + b + c = 180°

(Sum of angles of triangles)

∴ a + 180° = 265°

⇒ a = 265° - 180° = 85°

But a + b = 140°

⇒ 85° + b = 140°

⇒ b = 140° - 85° = 55°

And a + c = 125° ⇒ 85° + c = 125°

⇒ c = 125° - 85° = 40°

Hence, a = 85°, b = 55° = 40°

Answer 2

Step-by-step explanation:

a+b=140 (Exterior angle is equal to the sum of two opposite interior angles)

a+c=125 (Exterior angle is equal to the sum of two opposite interior angles)

a+b+c=180(Angle Sum Property)

140+c=180

c=40 degree

a+40=125

a=85degree

85+b=140

a=55 degree