An equilateral triangle has a semiperimeter of 6 meters.
2 answers:
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Answer:
Step-by-step explanation:
Given
Required
Find CD
This question is represented with the attached triangle
To solve CD, we make use of tan formula.
Substitute 12 for DE
Make CD the subject
--- approximated
Answer: The director can choose first a lead singer and then a stand-in for the lead singer in 132 ways.
Step-by-step explanation:
Given : The total number of singers auditioning for the school musical.= 12
The director wanted choose first a lead singer and then a stand-in for the lead singer.
We use Permutations here because order of selecting the singers matters.
The number of permutations of selecting r things out of n things =
Similarly , the number of ways to select 2 singers in an order from 12 singers
Hence, the director can choose first a lead singer and then a stand-in for the lead singer in 132 ways.