Answer:
5. 18
6. 12
7. 12.1
Explanation:
You want the length of ST in each of the drawings shown.
Segment addition
The segment addition theorem tells you the whole is the sum of the parts. To find the length of one part, other parts can be subtracted from the whole (exercises 5 and 6). To find the whole, you can add the parts (exercise 7).
5. 22
ST +4 = 22
ST = 22 -4 = 18
The length of ST is 18.
6. 24
6 +ST +6 = 24
ST = 24 -6 -6 = 12
The length of ST is 12.
7. Unknown
4.5 +7.6 = ST
12.1 = ST
The length of ST is 12.1.
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