A rhombus

A rhombus has sides of length 10 cm, and the angle between two adjacent sides is 76 degrees. Find the length of the longer diagonal of the rhombus.

Correct answer:

d1 =  15.7602 cm

Step-by-step explanation:

a=10 cm A=76  A2=A° rad=A° 180π =76° 1803.1415926 =1.32645=19π/45  cosA2/2=ad1/2  d1=2 a cos(A2/2)=2 10 cos(1.3265/2)=15.7602 cm



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Do you want to convert length units?
See also our right triangle calculator.
Cosine rule uses trigonometric SAS triangle calculator.
See also our trigonometric triangle calculator.

You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1   video2

Related math problems and questions: