Answer: 4m
Step-by-step explanation:
Note : midpoints divide a line into two equal parts.
To calculate the length of SA;
We can consider the large triangle QRS with
Two midpoints :
A on the line QS, QA = 4m ;
and B on the line RS with RB = 3m
Fron the definition of midpoint :
QS = QA + AS
where QA = AS
QS = 2QA = 2AS
Therefore,
QA = QS
4m = 4m
9/10 * 2/2 = 18/20
9/10 * 3/3 = 27/30
Angle 1 = 128
Angle 2 = 64
Angle 3 = 64
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Hope this helps!! :)