A four sided figure has a perimeter of 26. The other three sides' measurements are 10.5, 9, and 2.8. What is the measure of the last side?

1 Answer
sankarankalyanam
Mar 31, 2018

#color(blue)("Measure of the last side " = 3.7 " units"#

Explanation:

http://tgbasics.weebly.com/quadrilaterals.html

#"Given : " AD = 10.5, CD = 9, BC = 2.8, " Perimeter " = P = 26#

To find side AB.

#P = AB + BC + CD + AD#

#26 = AB + 2.8 + 9 + 10.5#

#AB = 26 - (2.8 + 9 + 10.5) = 26 - 22.3 = 3.7 " units"#

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