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nadezda [96]
3 years ago
9

In triangle ABC, angle C is a right angle and BC=5. If measure of angle B = 30 degrees, find AC

Mathematics
2 answers:
Nina [5.8K]3 years ago
5 0
Answer = d

using the 30 - 60 - 90 triangle theorem

side across from the angle

across from angle 30 is x
across from angle 60 is x rad. 3
across from 90 is 2x

BC is across from angle 60
so BC is the x rad 3
set the given measurement equal to it

x sqrt 3 = 5
÷ sqrt 3 ÷ sqrt 3
x = (5/ sqrt 3)
multiply top and bottom by the radical to get rid of the radical in the bottom

x = (5/ sqrt 3) × (sqrt 3/sqrt 3)
x = 5 sqrt 3/ 3

since side BC is x
BC = 5 sqrt 3/ 3

* Drawing the triangle diagram would help*
steposvetlana [31]3 years ago
4 0

Answer:

D

Step-by-step explanation:

._.

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