The bisector of one of the angles of a rectangle also bisects a side of the rectangle. Find the perimeter of the rectangle if you know that the smaller side of the rectangle is equal to 10 cm.
I need the perimeter in cm please
2 answers
the angle bisector splits a corner into two 45° angles. That means that the rectangle is 10x20.
you have to add 10 and 10 because the bisector splits side DC into two so instead of 20 you have 10, then AD is 10 so basically at the 20 and 20 and then the ten and ten so 20+20+10+10= 60 cm