These are more question, i studied and all, but i feel like learned nothing, but thx

(angles of a triangle have to add up to 180°)
For the first picture, #10 is x=80° ; y=140° ; z=20°
#11 I believe is quadrilateral ; irregular
For the second picture, #9 is x= 67°

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's