Answer:
The fourth side is 129.36 cm long.
Step-by-step explanation:
Perimeter of Quadrilateral
A quadrilateral is a polygon with four sides and four vertices. It is from the word "quad" which means four and "lateral" which means side. It is a two-dimensional shape and has straight sides. The sum of its interior angles is 360°. Some examples of quadrilateral are square, rectangle, rhombus and trapezoid.
Perimeter refers to the sum of lengths of all sides. To find the perimeter of a quadrilateral, you have to add all the measures of its sides.
Going back to the given problem above, you have to find for the length of the fourth side of the quadrilateral. To do that, you have to subtract the sum of the given sides from the perimeter.
Given:
perimeter - 412.95 cm
three sides - 85.56 cm, 112.77 cm and 85.26 cm
Equation:
412.95 cm - (85.56 cm + 112.77 cm + 85.26 cm) = N
Solution:
412.95 cm - (85.56 cm + 112.77 cm + 85.26 cm)
= 412.95 cm - 283.59 cm
= 129.36 cm
Final Answer:
129.36 cm
