Заполните пропуски словами, используя изученный лексический материал 1)perpendicular means to another line or plane 2)triangles have 3)squares and their sides 4)tranles, squares and rectangles

1) Perpendicular means at right angle to another line or plane
2) Triangles have three sides.
3) Squares have four sides and their sides are equal.
4) Tranles, squares and rectangles have four sides