Find the all the angles of a triangle with side lengths of 8cm, 11cm and 11cm.

Using the knowledge of a2 = b2 + c2 - 2bcCos(A)

Rearrange to aquire Cos(A) = (b2 + c2 - a2)/2bc

Then input the values to obtain the angles of 42, 69, 69.

Answered by Alexander J. Maths tutor

4917 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Solve the differential equation (1 + x^2)dy/dx = x tan(y)


Find the value of: d/dx(x^2*sin(x))


How can you factorise expressions with power 3 or higher?


You're on a game show and have a choice of three boxes, in one box is £10, 000 in the other two are nothing. You pick one box, the host then opens one of the other boxes showing it's empty, should you stick or switch?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences