Formula Flashcards
In the quadratic formula, x = ?
x =
−b ± √(b2 − 4ac)
_________________
2a
What is the formula for the calculation of the sum of the interior angles on an n-sided polygon?
The sum of the interior angles on an n-sided polygon is =
(n - 2) x 180
where n = number of sides
What is the formula for the calculation of each interior angle in a polygon?
Each interior angle of a polygon =
(n - 2) x 180
____________
n
Where n = number of sides
What is the sum of all the exterior angles in a polygon?
The sum of all the exterior angles in a polygon is 360º.
Based on the sum of all the exterior angles in a polygon being 360º,
what is the formula that can be used t obtain the number of sides of a polygon?
The number of sides of a polygon can be obtained by using the formula:
360º \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ each exterior angle
Based on the formula:
(n - 2) x 180
for the finding of the sum of the interior angles in a polygon, what is the formula that can be used to obtain the number of sides of a polygon?
The number of sides of a polygon can be obtained by using the formula:
(n - 2) x 180
____________________
each interior angle
What does the sum of the interior and exterior angles of a polygon add up to?
The sum of the interior and the exterior angle of a polygon add up to 180º.
What is Pythagoras’ theorem?
For calculation of a hypotenuse, adjecent/opposite side of a triangle
The Pythagoras’ theorem is
c²= a² + b²
What is the formula for the calculation of the area of a triangle?
This is in a right angled triangle.
Area of a triangle =
1/2 b × h
What is the formula for the calculation of the perimeter of a triangle?
This is in a right angled triangle.
Perimeter of a triangle =
a + h + b
a = hypotenuse
b = adjecent
h = opposite
What is the formula for the calculation of the area of a non-right angle triangle?
The area of a non-right angle triangle =
1/2 abSinθ
a and b are on either side of angle θ
What is the formula for the calculation of the perimeter of a non-right angle triangle?
Perimeter of a non-right angle triangle =
a + b + c
What formula is used to calculate the area of a rectangle?
The formula used to calculate th area of rectangle =
L x W
L = length W = width
What formula is used for the calculation of the perimeter of a rectangle?
The formula used for the calculation of the area of a rectangle =
2L + 2W
L = length W = width
What is the formula for the calculation of the area of a parallelogram?
Without a given angle.
Area of a parallelogram =
b x h
b = base | h = height
