Perimeter with Missing Side Lengths

A rectangle has a perimeter of 26 centimeters. Two sides are each 10 centimeters long. What is the length of the other two sides of the rectangle in centimeters? 10 cm 26 cm 3 cm 6 cm A triangle has a perimeter of 34 inches. Two of the sides are each 11 inches long. What is the length of the third side in inches? 11 in 12 in 34 in Not Here A rectangle has a perimeter of 54 inches. Two of the sides are each 15 inches long. How long are the other two sides of the rectangle in inches? 12 in A triangle has a perimeter of 18 units. Each side of the triangle is the same length. What is the length of one side of the triangle? 6 units A triangle has a perimeter of 44 meters. Two of the sides are each 14 meters long. What is the length of the third side in meters? 28 m 16 m 30 m 14 m