Guided Practice #2

Practice Problem #3

Find the length of segment RT.

A trapazoid has bases with length 9 and 12. The midsegment is labeled R T

Ok, so this is a midsegment problem. Remember,

midsegment = half the sum of the bases

Start by entering your known values.

R T = (9 + blank) over 2

Answer: 12

Simplify the numerator.

R T = blank over 2

Answer: 21

Simplify to solve. Put your answer in decimal format.

RT = ___

Answer: 10.5

Practice Problem #4

Find the length of segment PQ.

Trapazoid N P Q O has base N O with length 20. The midsegment R T has length 16. Base P Q is unknown and is labeled x

Even though you are not solving for the midsegment, you can still use the relationship between the midsegment and the bases to find the missing length.

R T = (P Q + N O) over 2

Start by entering your known values.

blank = (x + blank) over 2

Answer: 16, 20

Multiply both sides by 2 to eliminate the fraction.

___ = ___

Answer: 32, x + 20

Isolate the x to solve.

___ = x

Answer: 12

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