Question

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Q5

Answer 1

45°

Explanation:

The sum of the 3 angles in a triangle = 180°

Sum the 3 given angles and equate to 180, that is

3x + 4x + 5x = 180, that is

12x = 180 ( divide both sides by 12 )

x = 15

Thus

smallest angle = 3x = 3 × 15 = 45°

Answer 2

all work is pictured and shown