You are given a triangle ABC with sides length AB = 20cm, BC = 100cm and angle A = 70 degrees. Find the angle of C in degrees.

Always draw a diagram first to help with clarity.Correct use of Sine Rule:sin(A)/BC = sin(C)/ABTherefore sin(C) = ABsin(A)/BC sin(C) = 20sin(70)/100 sin(C) = 0.188 (rounded to 3 Significant Figures) C = arcsin(0.188) = 10.83 (rounded to 2 decimal places)

Answered by Arron P. Maths tutor

2409 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

If I toss a coin 3 times what is the probability of it landing on heads at least once?


What is the length of the hypotenuse of this right angled triangle?


Solve the simultaneous equations: y=x^2 + 3x + 7 and y=x + 10


Given that 346 × 27 = 9342 , work out 34.6 × 2.7


We're here to help

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