What is the area of triangle ABC where AB = 5 cm, BC = 12 cm and angle ABC = 50 degrees?
To find the area of a triangle where the length of the base and perpendicular heights are not known, use the sine rule to find the area. This is: Area = 0.5 x a x b x sin(angle between lengths a and b) Hence for the above numbers, area = 0.5 x 5 cm x 12 cm x sin(50 degrees) = 23 sq. cm (put numbers into calculator)
AS
Related Maths GCSE answers
All answers ▸Write x² + 4x -16 = 0 in the form (x+a)² - b = 0. Solve the equation giving your answer in surd form as simply as possible.
What is the value of an investment of £4500 with compound interest of 1.3% after six years?
Show that (4x – 5)^2 – 5x(3x – 8) is positive for all values of x
what is standard form?