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Diagonal 1 of Cyclic Quadrilateral is a line segment joining opposite vertices (A and C) of the Cyclic Quadrilateral. Check FAQs
d1=((SaSd)+(SbSc)(SaSb)+(ScSd))d2
d1 - Diagonal 1 of Cyclic Quadrilateral?Sa - Side A of Cyclic Quadrilateral?Sd - Side D of Cyclic Quadrilateral?Sb - Side B of Cyclic Quadrilateral?Sc - Side C of Cyclic Quadrilateral?d2 - Diagonal 2 of Cyclic Quadrilateral?

Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem Example

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Here is how the Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem equation looks like with Values.

Here is how the Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem equation looks like with Units.

Here is how the Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem equation looks like.

11.2615Edit=((10Edit5Edit)+(9Edit8Edit)(10Edit9Edit)+(8Edit5Edit))12Edit
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Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem Solution

Follow our step by step solution on how to calculate Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem?

FIRST Step Consider the formula
d1=((SaSd)+(SbSc)(SaSb)+(ScSd))d2
Next Step Substitute values of Variables
d1=((10m5m)+(9m8m)(10m9m)+(8m5m))12m
Next Step Prepare to Evaluate
d1=((105)+(98)(109)+(85))12
Next Step Evaluate
d1=11.2615384615385m
LAST Step Rounding Answer
d1=11.2615m

Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem Formula Elements

Variables
Diagonal 1 of Cyclic Quadrilateral
Diagonal 1 of Cyclic Quadrilateral is a line segment joining opposite vertices (A and C) of the Cyclic Quadrilateral.
Symbol: d1
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Side A of Cyclic Quadrilateral
Side A of Cyclic Quadrilateral is one of the four sides of the Cyclic Quadrilateral.
Symbol: Sa
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Side D of Cyclic Quadrilateral
Side D of Cyclic Quadrilateral is one of the four sides of the Cyclic Quadrilateral.
Symbol: Sd
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Side B of Cyclic Quadrilateral
Side B of Cyclic Quadrilateral is one of the four sides of the Cyclic Quadrilateral.
Symbol: Sb
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Side C of Cyclic Quadrilateral
Side C of Cyclic Quadrilateral is one of the four sides of Cyclic Quadrilateral.
Symbol: Sc
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Diagonal 2 of Cyclic Quadrilateral
Diagonal 2 of Cyclic Quadrilateral is a line segment joining opposite vertices (B and D) of the Cyclic Quadrilateral.
Symbol: d2
Measurement: LengthUnit: m
Note: Value should be greater than 0.

Other Formulas to find Diagonal 1 of Cyclic Quadrilateral

​Go Diagonal 1 of Cyclic Quadrilateral
d1=((SaSc)+(SbSd))((SaSd)+(SbSc))(SaSb)+(ScSd)
​Go Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Theorem
d1=(SaSc)+(SbSd)d2

Other formulas in Diagonals of Cyclic Quadrilateral category

​Go Diagonal 2 of Cyclic Quadrilateral
d2=((SaSb)+(ScSd))((SaSc)+(SbSd))(SaSd)+(ScSb)

How to Evaluate Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem?

Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem evaluator uses Diagonal 1 of Cyclic Quadrilateral = (((Side A of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral)+(Side B of Cyclic Quadrilateral*Side C of Cyclic Quadrilateral))/((Side A of Cyclic Quadrilateral*Side B of Cyclic Quadrilateral)+(Side C of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral)))*Diagonal 2 of Cyclic Quadrilateral to evaluate the Diagonal 1 of Cyclic Quadrilateral, The Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem formula is defined as the line segment joining opposite vertices (A and C) of the Cyclic Quadrilateral, calculated using Ptolemy's second theorem. Diagonal 1 of Cyclic Quadrilateral is denoted by d1 symbol.

How to evaluate Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem using this online evaluator? To use this online evaluator for Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem, enter Side A of Cyclic Quadrilateral (Sa), Side D of Cyclic Quadrilateral (Sd), Side B of Cyclic Quadrilateral (Sb), Side C of Cyclic Quadrilateral (Sc) & Diagonal 2 of Cyclic Quadrilateral (d2) and hit the calculate button.

FAQs on Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem

What is the formula to find Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem?
The formula of Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem is expressed as Diagonal 1 of Cyclic Quadrilateral = (((Side A of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral)+(Side B of Cyclic Quadrilateral*Side C of Cyclic Quadrilateral))/((Side A of Cyclic Quadrilateral*Side B of Cyclic Quadrilateral)+(Side C of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral)))*Diagonal 2 of Cyclic Quadrilateral. Here is an example- 11.26154 = (((10*5)+(9*8))/((10*9)+(8*5)))*12.
How to calculate Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem?
With Side A of Cyclic Quadrilateral (Sa), Side D of Cyclic Quadrilateral (Sd), Side B of Cyclic Quadrilateral (Sb), Side C of Cyclic Quadrilateral (Sc) & Diagonal 2 of Cyclic Quadrilateral (d2) we can find Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem using the formula - Diagonal 1 of Cyclic Quadrilateral = (((Side A of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral)+(Side B of Cyclic Quadrilateral*Side C of Cyclic Quadrilateral))/((Side A of Cyclic Quadrilateral*Side B of Cyclic Quadrilateral)+(Side C of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral)))*Diagonal 2 of Cyclic Quadrilateral.
What are the other ways to Calculate Diagonal 1 of Cyclic Quadrilateral?
Here are the different ways to Calculate Diagonal 1 of Cyclic Quadrilateral-
  • Diagonal 1 of Cyclic Quadrilateral=sqrt((((Side A of Cyclic Quadrilateral*Side C of Cyclic Quadrilateral)+(Side B of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral))*((Side A of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral)+(Side B of Cyclic Quadrilateral*Side C of Cyclic Quadrilateral)))/((Side A of Cyclic Quadrilateral*Side B of Cyclic Quadrilateral)+(Side C of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral)))OpenImg
  • Diagonal 1 of Cyclic Quadrilateral=((Side A of Cyclic Quadrilateral*Side C of Cyclic Quadrilateral)+(Side B of Cyclic Quadrilateral*Side D of Cyclic Quadrilateral))/Diagonal 2 of Cyclic QuadrilateralOpenImg
Can the Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem be negative?
No, the Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem, measured in Length cannot be negative.
Which unit is used to measure Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem?
Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Diagonal 1 of Cyclic Quadrilateral using Ptolemy's Second Theorem can be measured.
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