Find lengths and measures of bisected line segments and angles
Key Notes:
Bisecting a line segment means dividing it into two congruent line segments.
Learn with an example
A line segment is bisected, forming two new line segments. If the original line segment had a measure of 8 centimetres, what is the measure of each new line segment?—–cm


The original line segment measures 8 centimetres. Divide by 2 to find each new, smaller line segment.
8 ÷ 2 = 4
So, each new line segment measures 4 centimetres.
After bisecting a line segment measuring 18 inches, Zeke has two line segments. What is the measure of each new line segment?


The original line segment measures 18 inches. Divide by 2 to find each new, smaller line segment.
18 ÷ 2 = 9
So, each new line segment measures 9 inches.
A line segment is bisected, forming two new line segments. Each new line segment has a measure of 5 inches. What was the measure of the original line segment?


Each new line segment measures 5 inches. Multiply by 2 to find the original, larger line segment.
5 × 2 = 10
So, the original line segment measured 10 inches.
let’s practice!