Find the side length $y$y indicated on the diagram. The perimeter of the shape is $29$29 m.
Find the side length $d$d indicated on the diagram. The perimeter of the shape is $35$35 cm.
Find the side length $d$d indicated on the diagram. The perimeter of the shape is $22$22 m.
Find the remaining side length of a triangle if the perimeter of the shape is $64$64 mm and two of the sides measure $19$19 mm and $21$21 mm.