OpenStax, Algebra and Trigonometry 2e §10.2 Non-right Triangles: Law of Cosines · Exercise 54 · Trigonometry · Laws of sines & cosines
Non-right Triangles: Law of Cosines · Exercise 54
The sides of a parallelogram are 28 centimeters and 40 centimeters. The measure of the larger angle is 100°. Find the length of the shorter diagonal.
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Algebra and Trigonometry 2e · §10.2 Non-right Triangles: Law of Cosines · Exercise 54
Stuck? A gentle nudge
No hints for this one.
Your working
Check your full solution
Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.