Right Triangle Similarity — Unit test Answers

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7

On a number line, the directed line segment from Q to S has endpoints Q at –8 and S at 12. Point R partitions the directed line segment from Q to S in a 4:1 ratio.Which expression correctly uses the formula to find the location of point R?

Question illustration
A
(StartFraction 1 Over 1 + 4 EndFraction) (12 minus (negative 8)) + (negative 8)
Option A
B
(StartFraction 4 Over 4 + 1 EndFraction) (12 minus (negative 8)) + (negative 8)
Option B
C
(StartFraction 4 Over 4 + 1 EndFraction) (negative 8 minus 12) + 12
Option C
D
(StartFraction 4 Over 1 + 4 EndFraction) (negative 8 minus 12) + 12
Option D
8

Why is partitioning a directed line segment into a ratio of 1:3 not the same as finding the length of the directed line segment?

Question illustration
A
The ratio given is part to whole, but fractions compare part to part.
B
The ratio given is part to part. The total number of parts in the whole is 3 – 1 = 2.
C
The ratio given is part to part. The total number of parts in the whole is 1 + 3 = 4.
D
The ratio given is part to whole, but the associated fraction is .
Option D
10

Point P partitions the directed line segment from A to B into the ratio 3:4. Will P be closer to A or B? Why?

Question illustration
A
P will be closer to A because it will be the distance from A to B.
Option A
B
P will be closer to A because it will be the distance from A to B.
Option B
C
P will be closer to B because it will be the distance from B to A.
Option C
D
P will be closer to B because it will be the distance from B to A.
Option D

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Right Triangle Similarity — Unit test Answers —…