1–3
Locating Points and Midpoints
Locating Points and
Midpoints
LESSON
1–3

1–3
Locating Points and Midpoints
Five-Minute Check (over Lesson 1–2)
TEKS
Then/Now
New Vocabulary
Key Concept:
Midpoint Formula (on Number Line)
Example 1:
Real-World Example: Find Midpoint on Number Line
Key Concept:
Midpoint Formula (in Coordinate Plane)
Example 2:
Find Midpoint in Coordinate Plane
Example 3:
Finding Missing Coordinates
Example 4:
Find Missing Measures
Example 5:
Locating a Point at Fractional Distances
Example 6:
Fractional Distances on a Coordinate Plane
Example 7:
Locating a Point Given a Ratio

Over Lesson 1–2
1–3
Locating Points and Midpoints
What is the value of x and ABif Bis between C, AB= 3x+ 2, BC= 7, and AC= 8x– 1?
A
and
A.x= 2, AB= 8B.x= 1, AB= 5C.D.x= –2, AB= –4

Over Lesson 1–2If Mis between Land N, LN= 3x– 1, LM= 4, and MN= x– 1, what is the value of x and
1–3
Locating Points and Midpoints
MN
?

Over Lesson 1–2
1–3
Locating Points and Midpoints
Find
RT
.
A.
B.
C.
D.
.
.
in.
in.

Over Lesson 1–2
1–3
Locating Points and Midpoints