Question

The three angles of a triangle are (x – 20)0,
(2x + 30)0and 200. Determine the size of each angle.
(Hint: the sum of 3 angles = 1800)

Answer 1

Answer:

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Answer 2

Answer:

30°, 20°, 130°

Step-by-step explanation:

$x - 20 + 2x + 30 + 20 = 180$

$3x + 30 = 180$

$3x = 180 - 30$

$3x = 150$

$x = 150 \div 3$

$x = 50$

$then \: angle =$

$x - 20 \\ 50 - 20 = 30$

$2x + 30 \\ 100 + 30 = 130$

$20$