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the angles of a quadrilateral will add up to 360 degrees, so if you have the angles of the first three vertices, you can find the measure of the last one by subtracting the sum of all the other angles from 360.

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Q: How do you find the missing side of a square?
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How do you find a missing side of a triangle?

The way to find the missing side of a triangle-THIS ONLY WORKS ON RIGHT ANGLED TRIANGLES-is square both sides seperately and then add them together to give you the square of the missing side-find the square root and that is the size of the missing side-eg. if you have a RIGHT ANGLED TRIANGLE with sides of 3inch and 4inch then (3x3) + (4x4) = 25 so the square root of 25 is 5 meaning the missing side is 5inch.


What are two ways to find a missing side length of a square?

Here's a sneaky way to do it, based on an ancient secret of wisdomfrom the Himalayan caves of Nepal and Tibet:If you're sure it's a square, and you know the length of any side,then the missing side has the same length as the one you know !


What is one way to find the missing side length?

One way to find a missing side length of a triangle is to use the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²). If you know the lengths of two sides, you can rearrange the formula to solve for the missing side. For example, if you have the lengths of the two legs (a and b), you can find the hypotenuse (c) by calculating c = √(a² + b²).


How do you find the missing angle of a square with no given angles?

All the angles of a square are 90 degrees.


Find the area of the square?

Take the square of the side.Take the square of the side.Take the square of the side.Take the square of the side.