Question

two angles of a triangle ABC are 45° and 60° . find the third triangle​

Answer 1

Answer:

sum of angle of a triangle is equal to 180°

let the third angle be x°

$x + 45 + 60 = 180 \\ x + 105 = 180 \\ x = 180-105=75$

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Answer 2

Answer:

75°

Step-by-step explanation:

Sum of a triangle = 180°

Sum of the triangle = 45 + 60 + x

Sum of the triangle = 105 + x

Third angle = 180 - 105 = 75°