JUPEBMathematicsTrigonometry

Find the area of a triangle with two sides of length $8$ cm and $6$ cm and an included angle of $30^\circ$.

A$12\sqrt{3}$ cm$^2$
B$24$ cm$^2$
C$48$ cm$^2$
D$12$ cm$^2$CORRECT
AI
Toaster Teacher
Why the answer is D, and why the others tempt you.
Area $= \dfrac{1}{2}ab\sin C = \dfrac{1}{2}(8)(6)\sin 30^\circ = 24 \times \dfrac{1}{2} = 12$ cm$^2$. Using $\cos 30^\circ$ instead of $\sin 30^\circ$ gives $12\sqrt{3}$, and omitting the half gives 24.
Want this in Pidgin, Yoruba, Igbo or Hausa? Sign up free →

Practice more Mathematics questions

JUPEB Mathematics has thousands more questions like this — with Worked answers on every one.