Answer:
BC = 8 cm
Step-by-step explanation:
tan(x) = sin(x)/cos(x)
sin(x) is the opposite side of the angle x.
cos(x) is the side with a right angle to sin(x).
2 = 12/EC
EC = 12/2 = 6 cm
=>
CD = ED - EC = 10 - 6 = 4 cm
now, the same tan(x) relation had to be true for BCD.
tan(x) = BC/CD
2 = BC/4
BC = 8 cm
Add all the numbers together, the answer is 172 feet
Doubling d is two times d: 2d
Divide 9 by the result (2d): 9/2d
Answer: 9/2d (with 2d in the Denominator)
Suplementary is adding up to 180
acute means less than 90
so angle less than 90+something=180
is this something always, sometimes never acute
so
less than 90+less than 90=less than 180
so never
What are the expressions? I can't help without them.