Back to Derive triangle area formula — Problem 3 · Task Set 22

Exercises: Derive the Formula A = (1/2)ab sin(C)

Grade 10·21 problems·~30 min·Common Core Math - HS Geometry·standard·hsg-srt-d-9

Work through problems with immediate feedback

Fluency Practice

$Triangle PQR with sides PQ = 10, PR = 12, and included angle P = 50 degrees, with the area labeled as unknown$

Triangle $PQR$ has sides $PQ = 10$ and $PR = 12$ , with included angle $P = 50\degree$ . Find the area of triangle $PQR$ . Use $\sin(50\degree) \approx 0.766$ . Round to the nearest tenth.