6
algebra

The angles of a triangle are in ratio 1:2:3. What is the smallest angle?

A

30

B

90

C

45

D

60

Correct Answer: A

Choice Ahoice D is the correct answer.

  1. Equation: x+2x+3x=180x + 2x + 3x = 180
  2. Combine: 6x=1806x = 180
  3. Divide by 6: x=30x = 30

Choice Ahoice D is incorrect because this is the middle angle.

Choice Ahoice C is incorrect because this is the largest angle.

Choice Ahoice C is incorrect because calculation error.