You can think of a square as two isosceles right angle triangles and use Pythagoras.
x^2 + x^2 = 22^2
x^2 + x^2 = 484
2x^2 = 484
x^2 = 242
x = 11√2
One side of the playground is 11√2 m long.
External angle is equal to the sum of the other 2 internal angles
2x=x-5+63
minus x from both sides
x=-5+63
x=58
x=58°
Step-by-step explanation:
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<u>★ Solution :-</u></h3>


Here,




Answer: b is the answer
Step-by-step explanation:
In this question , we have to find the postulate that is illustrated for the real numbers

The postulate is Additive inverse postulate which states that

Where a is the real number and -a is the opposite of a. It states that , if opposite of a number is added with the number, the result is 0 .