A multiple-choice quiz
by apiankymap13.
Estimated time: 4 mins.

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Scroll down to the bottom for the answer key.

Quiz Answer Key and Fun Facts

Answer:
**(A^2 + B^2)^ 1/2**

According to Pythagoras' theorem, the sum of the squares of the legs of the right-angled triangle is equal to the square of the hypotenuse of the triangle. If hypotenuse =c, then a^2 + b^2 = c^2. This will calculate to c = root of (a^2 + b^2).

According to Pythagoras' theorem, the sum of the squares of the legs of the right-angled triangle is equal to the square of the hypotenuse of the triangle. If hypotenuse =c, then a^2 + b^2 = c^2. This will calculate to c = root of (a^2 + b^2).

Answer:
**(x+y)(x-y)**

This identity can be used to subtract the squares of two numbers quickly.

(x+y)(x-y) = x(x-y) + y(x-y) = x^2 - xy + yx - y^2.

This identity can be used to subtract the squares of two numbers quickly.

(x+y)(x-y) = x(x-y) + y(x-y) = x^2 - xy + yx - y^2.

Answer:
**Divide perimeter by 4**

All the four sides of a square are equal. So, the perimeter of a square is 4 times the length of the side. Thus, you get the side of the square by dividing the perimeter by 4.

All the four sides of a square are equal. So, the perimeter of a square is 4 times the length of the side. Thus, you get the side of the square by dividing the perimeter by 4.

Answer:
**a^2 + b^2 + 2ab**

This identity was discovered by an ancient Indian mathematician known as Aryabhatta. (a+b)^2 = (a+b)(a+b) = a(a+b) + b(a+b) = a^2 + ab + ba +b^2

= a^2 + b^2 + 2ab

This identity was discovered by an ancient Indian mathematician known as Aryabhatta. (a+b)^2 = (a+b)(a+b) = a(a+b) + b(a+b) = a^2 + ab + ba +b^2

= a^2 + b^2 + 2ab

Answer:
**Subtract 32**

The Kelvin scale is the SI unit of temperature but Celsius and Fahrenheit scales are commonly used. By adding 273.15 to the Celsius temperature reading, you can find the temperature in Kelvin.

The Kelvin scale is the SI unit of temperature but Celsius and Fahrenheit scales are commonly used. By adding 273.15 to the Celsius temperature reading, you can find the temperature in Kelvin.

Answer:
**Multiply by pi**

Values like 22/7 and 3.14159 are not exact, but approximate, values of pi, an irrational number. Since the diameter is double the radius of a circle, we can find the circumference by multiplying the radius by 2 and pi.

Values like 22/7 and 3.14159 are not exact, but approximate, values of pi, an irrational number. Since the diameter is double the radius of a circle, we can find the circumference by multiplying the radius by 2 and pi.

Answer:
**Find the square root of double the square of the side**

In a square, all sides are equal and all angles are 90 degrees. If the side = x and diagonal = y, then according to Pythagoras theorem x^2 + x^2 = y^2

2x^2 = y^2. Therefore, y = root of (2x^2).

In a square, all sides are equal and all angles are 90 degrees. If the side = x and diagonal = y, then according to Pythagoras theorem x^2 + x^2 = y^2

2x^2 = y^2. Therefore, y = root of (2x^2).

Answer:
**180 (x-2)**

The angle sum of a triangle is 180 degrees and the angle sum of a quadrilateral is 360 degrees. The formula can also be written as 180x - 360.

The angle sum of a triangle is 180 degrees and the angle sum of a quadrilateral is 360 degrees. The formula can also be written as 180x - 360.

Answer:
**It is always 360 degrees**

The sum of the exterior angles of a polygon is always 360 degrees, be it a concave or convex polygon. It is not related in any way to the number or length of sides of a polygon.

Note however that the exterior angle of a concave vertex is negative (it is the angle that adds up with the interior angle to 180° and a concave vertex has an interior angle greater than 180°).

The sum of the exterior angles of a polygon is always 360 degrees, be it a concave or convex polygon. It is not related in any way to the number or length of sides of a polygon.

Note however that the exterior angle of a concave vertex is negative (it is the angle that adds up with the interior angle to 180° and a concave vertex has an interior angle greater than 180°).

Answer:
**Distance / Time**

The SI unit of speed is metres/second. Miles per hour and kilometres per hour are also common ways of measuring speed.

The SI unit of speed is metres/second. Miles per hour and kilometres per hour are also common ways of measuring speed.

This quiz was reviewed by FunTrivia editor WesleyCrusher before going online.

Any errors found in FunTrivia content are routinely corrected through our feedback system.

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Referenced Topics

Science
Math
Mathematicians
Theorems
Pythagoras
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