Question

please solve question number 15 to 20

Answer 1

15. b will not be a triangle. the angles add up to 190°
16. 40° as they are parallel and are corresponding angles.
18. 360°-(70+80+100)° =110°
19. hexagon has 6 sides. so 6x90 =720°
20. 40°+(7x+3x)= 180° [linear pair]
=>10x=180°-40°
=>X= 150/10
=> X = 15°