Draw the images P′, Q′ and R′ of the points P,Q and R, respectively in the line n (Fig. 9.18).Join P′ Q′ and Q′ R′ to form an angle P′ Q′ R′.Measure ∠PQR and ∠P′Q′R′. Are the twoangles equal?
Draw the images P′, Q′ and R′ of the points P,Q and R, respectively in the line n (Fig. 9.18).Join P′ Q′ and Q′ R′ to form an angle P′ Q′ R′.Measure ∠PQR and ∠P′Q′R′. Are the two angles equal?