Problem
GEO-B1-M01-P003 Triangle Angles in a Ratio
#3
★☆☆☆☆ Level 1 of 5
The angles of a triangle are in the ratio \(2:3:4\). Find the angles.
Denote the angles by \(2x\), \(3x\), and \(4x\).
Let the angles be \(2x\), \(3x\), and \(4x\). Their sum is \(180^\circ\), hence \(9x=180^\circ\) and \(x=20^\circ\). The angles are \(40^\circ\), \(60^\circ\), and \(80^\circ\).
Ask students to write the angle sum equation rather than guess the answer.