In triangle ABC, side AB is 9" and side BC is 5" . How large is AC if the perimeter is 21" ?

SmartMathMan Nov 12, 2018

#1**+2 **

You have two sides and the total of the THREE sides....just subtract the two sides from the total to find the remaining side length.

21 - 9 - 5 = 7" = AC

ElectricPavlov Nov 13, 2018