If two angles of a triangle are 45⁰ and 65⁰, then the third angle is

70⁰

105⁰

65⁰

75⁰

2 thoughts on “If two angles of a triangle are 45⁰ and 65⁰, then the third angle is<br /><br />70⁰<br /><br />105⁰<br /><br />65⁰<br /><br />75⁰”

1. Answer:

   Ans = 70°

   Step-by-step explanation:

   Let the third angle be x°

   45°+65°+x° = 180°(Angle sum property of triangle)

   110°+x°=180°

   x°=180°-170°

   x°=70°

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2. Given

   ⇒∠A=45°

   ⇒∠B=65°

   To Find

   ⇒∠C= x°

   We Know That

   ⇒The Sum of all interior angle in triangle is 180°

   ⇒∠A+∠B+∠C=180°

   Now Put the value

   ⇒45°+65°+∠C=180°

   ⇒110° + ∠C = 180°

   ⇒∠C = 180°-110°

   ⇒∠C = 70°

   Answer

   ⇒Third angle is 70°

   Now Check our answer

   ⇒∠A+∠B+∠C=180°

   Now Put the value

   ⇒∠C = 70°

   We get

   ⇒45°+65°+70°=180°

   ⇒110°+70° = 180°

   ⇒180° = 180°

   LHS = RHS

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