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In the figure, M and N are midpoints of RT and ST. What is the length of MN? a. a + b b. b - a c. 2 I think it's B. What do you think?
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In the figure, M and N are midpoints of RT and ST. What is the length of MN?

a. a + b
b. b - a
c. 2

I think it's B. What do you think?

In the figure, M and N are midpoints of RT and ST. What is the length of MN? a. a-example-1
User Idrumgood
by
6.2k points

1 Answer

4 votes
Length RS = 2b - 2a

Given that N is the midpoint of TS
⇒ Ratio of TN : TS = 1 : 2


(TN)/(TS) = (MN)/(RS)


(1)/(2) = (MN)/(2b-2a)


2MN = 2b - 2a


MN = b - a

Answer: b - a



User Xero Smith
by
5.8k points
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