Answer:
56.64 m
Step-by-step explanation:
The circumference of a circle = 2 π r
r = 9m
So,
= 2 π (9)
= 18 π
= 56.64 m
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B) 3+2 is the expression equivalent
Answer:
A
Step-by-step explanation:
Answer:
D.) 8
Step-by-step explanation:
You can use the Pythagorean theorem because this is a right triangle:

a and b are the legs and c is the hypotenuse. The hypotenuse is always the longest side in a right triangle (since it is opposite the biggest angle). The two legs squared have to add up to the hypotenuse squared.
Fill in values:

Simplify exponents:

Isolate the variable. Subtract 225 from both sides:

Find the square root of both sides:

The missing leg length is 8.
Answer:
x = 13, y = 18
Step-by-step explanation:
Since it has a 90 degree angle and a 45 degree angle, it is an isosceles triangle, so x = 13.
Use Pyth Theorem to find y:
13^2 + 13^2 = c^2
169 + 169 = c^2
338 = c^2
18.384 = c