7. Find the values of a and b from the
given figure. Given that p | q.
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Step-by-step explanation:
2a + 70 = 40° + 3a [ exterior angle property of ∆ ]
2a - 3a = 40° - 70°
- a = - 30°
=> a = 30 => 3a = 90°
40° + b + 3a = 180° [ angle sum property of ∆ ]
40° + b + 90° = 180°
b = 180° - [40° + 90° ]
b = 50°
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