Question

11.The three angles of triangle are in the ratio 1:2:1. Find all angles of a triangle.
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12. Find the marked unknown angles in the figure given below:​

Answer 1

Answer:

11. 1x+2x+1x = 180°

4x = 180°

x = 180/4

x= 45°

1x = 45°

2x = 90°

1x = 45°

12. (a) 70+72+z = 180°

142+z = 180°

z = 180°-142° = 38°

(b). 25+120+x° = 180°

x° = 180-145 = 35°