constructing the triangle should be no problem.
many examples of angle construction online.
since 30° is one of those special angles, the area is easy to calculate. Using the usual labeling, with angles A,B,C and sides a,b,c we have
area = 1/2 bc sinA = 1/2 * 12 * 8 * 1/2 = 24
use the law of cosines to find BC
then use the law of sines to find angle B
If you haven't had trig yet, then just construct and measure as instructed ...
construct a triangle ABC such that AB=12cm,AC=8cm and <BAC=30°.Draw a perpendicular line from C to meet AB at M.Measure <ABC,CM.Calculate the area of ∆ABC
1 answer
1 answer