ਤ੍ਰਿਭੁਜ ABC ਵਿੱਚ, AB=BC ਅਤੇ ∠B = 70° ਹੈ ਤਾਂ ∠A ਦਾ ਮੁੱਲ ਪਤਾ ਕਰੋ : In triangle ABC, if AB=BC and ∠B = 70°, ∠A will be: त्रिभुज ABC में, AB=BC और ∠B = 70° है तो ∠A का मूल्य पता करे: *
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Step-by-step explanation:
since,AB=AC
angleB =angle C=70°
so the sum of the angles of a triangle,
A+B+C=180°
A+70°+70°=180°
A+140°=180°
A=180°-140°
A=40°
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