The angles of triangle are 45 ∘ ,60 ∘ find the third angle . - IQ786

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The angles of triangle are 45 ∘ ,60 ∘ find the third angle .

The angles of triangle are 45 ∘ ,60 ∘ find the third angle .

85 ∘

45 ∘

75 ∘

65 ∘

Explanation

Let the triangle be $Δ A B C$
The sum of angles in triangle is $18 0^{\circ}$
$4 5^{\circ} + 6 0^{\circ} + ∠ C = 18 0^{\circ} ∠ C = 180 - 45 - 60 ∠ C = 7 5^{\circ}$