Answer:
17) sometimes
18) sometimes
19) sometimes
20) sometimes
21)what is it asking
Explanation:
17) in terms of the square that's correct but in terms of a rectangle it's not
18) the the angles could be 30, 60, 92, 178.. the four angles have to add up to 360 but they could be 150 for example 30, 30, 150, 150,
19) in in terms of a rectangle, kite etc it's correct. but for a kite or a trapezoid it's not
20) in in terms of a kite yes but in terms of a square no.
21)??