Bc And Ad Calculator

Bc And Ad Calculator

So, AD is now just a 'Year Number' (every New Year we add 1), and it only roughly equals how many years ago that Jesus Christ was born. '2000 AD' or 'AD 2000' Should 'AD' be written before or after the number? It WAS common to write it before (the standard was to put 'AD' before the year and 'BC' after), but now many people put 'AD' after the year number.
Calculate the amount of time between two dates. Date Duration Calculator Calculate the amount of time between two dates.
3 Trapezoid CalculatorsScroll Down for instructions and definitionsClick here to see information for all quadrilaterals.For a kite calculator, click here kites.For a parallelogram calculator, click here parallelograms.How Long Is BcFor a rhombus calculator, click here rhombuses.For a square and rectangle calculator, click here squares.The year calculator starts by counting the entire first day, but doesn't count the ending date. Try it: enter the day and the next date and you'll get '1', not '2' or '0' days in between. Does the year calculator include leap years? The line perpendicular to lines AD & BC is called the height or altitude. The line parallel to lines AD & BC, is at the midpoints of lines AB and DC and is called the median or the midsegment. The length of the median = (Line AD + Line BC) ÷ 2 Trapezoids have 2 pairs of adjacent angles (A & B) and (B & C) that are supplementary (add to 180°).
Trapezoid area = ((sum of the bases) ÷ 2) • height
Lines BC and AD are parallel and are called bases.
Lines AB and DC are the non-parallel sides and are called legs.
Lines AC (or q) and BD (or p) are called diagonals
The line perpendicular to lines AD & BC is called the height or altitude.
The line parallel to lines AD & BC, is at the midpoints of lines AB and DC and is called the medianBc And Ad Calculator or the midsegment.
The length of the median = (Line AD + Line BC) ÷ 2Bc And Ad Calculator
Trapezoids have 2 pairs of adjacent angles (A & B) and (B & C) that are supplementary (add to 180°).

To use this calculator, you need
both base lengths and the area.
To use this calculator, you need
both base lengths and the height.
* * * * * * * * * E x a m p l e * * * * * * * * *A trapezoid has bases that are 30 and 55 centimeters in length and the non-parallel sides (or legs) are 15 and 20 centimeters.
What is the area of the trapezoid?
Going by the diagram, we shall label the 4 sides as:
a = 55 b = 15 c = 30 d = 20
Before we can use the area formula, we first have to determine the height of the trapezoid.
(height)2 = (a+b-c+d) • (-a+b+c+d) • (a-b-c+d) • (a+b-c-d) ÷ (4 • (a -c)2)
(height)2 = (55+15-30+20) • (-55+15+30+20) • (55-15-30+20) • (55+15-30-20) ÷ (4 • (55 -30)2)
(height)2 = (60) • (10) • (30) • (20) ÷ (4 • (25)2)
(height)2 = 360,000 ÷ 2,500
(height)2 = 144
height = 12 cm
Now to use the area formula:
trapezoid area = ((sum of the bases) ÷ 2) • height
trapezoid area = ((55 + 30) ÷ 2) • 12
trapezoid area = 510 cm²
To see how to calculate trapezoid area without using formulas, click here.
* * * * * * * * * Trapezoids * * * * * * * * *ALL TRAPEZOIDS have the following properties:
1) ONE pair of opposite sides are parallel. (BC and AD)
 2) The sum of the angles attached to the same leg = 180°
 ∠ 'A' plus ∠ 'B' = 180° 
 ∠ 'C' plus ∠ 'D' = 180° 
4 special cases of trapezoids are worth mentioning.
The isosceles trapezoid has both legs of equal length. AB = CD
Both diagonals are equal. AC = BD
Lower base angles are equal. ∠ A = ∠ D 
Upper base angles are equal. ∠ B = ∠ C 
Angles attached to the same leg are supplementary. ∠ A + ∠ B = 180° ∠ C + ∠ D = 180° 
Opposite angles are supplementary. ∠ A + ∠ C = 180° ∠ B + ∠ D = 180° The right trapezoid has two right angles.

The acute trapezoid has two acute angles (A & D) located on each side of the long base (Line AD) and
it has two obtuse angles (B & C) on each side of the short base (Line BC).
The obtuse trapezoid has two obtuse opposite angles (A & C) and two acute opposite angles (B & D)
OR (using the same graphic) it has one acute angle and one obtuse angle on each base: angles (B & C) and angles (A & D)


The default setting is for 5 significant figures but you can change that by inputting another number in the box above.
Answers are displayed in scientific notation and for easier readability, numbers between .001 and 1,000 will be displayed in standard format (with the same number of significant figures.)
The answers should display properly but there are a few browsers that will show no output whatsoever. If so, enter a zero in the box above. This eliminates all formatting but it is better than seeing no output at all. 
Return To Geometry Index_____________________Return To Home PageCopyright © 1999 - 1728 Software Systems 