<p><strong>Angle Sum of a Triangle</strong></p>
<p style="text-align: center">The sum of interior angles of a triangle is $180{}^\circ $.</p>
<p style="text-align: center">(Angle sum of triangle)</p>
<div class="content-block"><figure class="question-figure aligncenter" style="text-align: center;"><img src="https://vocwkpgapvksartxhhor.supabase.co/storage/v1/object/sign/question-images/pasted/1764070408055-qcanz8z3osr.png?token=eyJraWQiOiJiZTM3ZjNhZS05OWM4LTQ5ZGQtYjRiNS1iMTBhYmJhNjY5MWYiLCJhbGciOiJIUzI1NiJ9.eyJ1cmwiOiJxdWVzdGlvbi1pbWFnZXMvcGFzdGVkLzE3NjQwNzA0MDgwNTUtcWNhbno4ejNvc3IucG5nIiwic2NvcGUiOiJkb3dubG9hZCIsImlhdCI6MTc5MzAwNzk2NCwiZXhwIjoxNzkzMDA4MjY0fQ.Lr09qVoaOym7-S5IQ9yKd_EtLZ9nG-QiZwsTkwC6F88" style="max-width: min(250px, 100%); height: auto; display: block;" class="aligncenter custom-width" /></figure></div>
<p style="text-align: center">$a{}^\circ +b{}^\circ +c{}^\circ =180{}^\circ $</p>
<p>Proof:</p>
<div class="content-block"><figure class="question-figure aligncenter" style="text-align: center;"><img src="https://vocwkpgapvksartxhhor.supabase.co/storage/v1/object/sign/question-images/pasted/1764070419727-hfjk0h8zngb.png?token=eyJraWQiOiJiZTM3ZjNhZS05OWM4LTQ5ZGQtYjRiNS1iMTBhYmJhNjY5MWYiLCJhbGciOiJIUzI1NiJ9.eyJ1cmwiOiJxdWVzdGlvbi1pbWFnZXMvcGFzdGVkLzE3NjQwNzA0MTk3MjctaGZqazBoOHpuZ2IucG5nIiwic2NvcGUiOiJkb3dubG9hZCIsImlhdCI6MTc5MzAwNzk2NCwiZXhwIjoxNzkzMDA4MjY0fQ.wSO_bHytB-6P7a4YkH-4ktz8IHIvpWvFNcBb_IYOEz8" style="max-width: min(250px, 100%); height: auto; display: block;" class="aligncenter custom-width" /></figure></div>

The sum of interior angles of a triangle is $180{}^\circ $.

$a{}^\circ +b{}^\circ +c{}^\circ =180{}^\circ $

Triangle Angle Sum and Exterior Angles

Angle Sum of a Triangle

Angle Sum of a Triangle

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