If a shape is a square, this mean that each side has the same length. This means that each side of the square has a length of 17cm. Perimeter is the length of the outer boundary of a shape or the summation (addition) of all the sides. This means that the perimeter of this square is 17+17+17+17 or 17×4 which is equal to 68cm.
I hope this helps!
Answer:
B
Step-by-step explanation:
let the angles be 3k,10k,2k
then 3k+10k+2k=180
15k=180
k=180/15=12
x=10k=10×12=120°
The value of the expression 
is 
<h3>How to evaluate the sum?</h3>
The attachment represents the proper format of the question
The summation expression is given as:
Expand the radicands
Evaluate the square roots
Add the like terms
Hence, the value of the expression is
Read more about expressions at:
brainly.com/question/723406
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Answer:
64,26
Step-by-step explanation:
The sum of the angles of a triangle add to 180 degrees
The box means its is a 90 degree angle
90 + 2x+ x-6 = 180
Combine like terms
84+3x = 180
Subtract 84 from each side
84+3x-84 = 180-84
3x=96
Divide by 3
3x/3 = 96/3
x = 32
The top angle is
2x = 2*32 = 64
The bottom right angle is x-6
32-6 = 26
