Question

Look at the figure and answer the following questions:



(1) Name all triangles in the figure.
(2) Name all triangles with vertex O.
(3) Name all triangles with vertex A.

Answer 1

(1) ∆ABC comprises three triangles: ∆ AOB, ∆ AOC and ∆ BOC.
Thus, there are four triangles namely,
∆ ABC, ∆ AOB, ∆ AOC and ∆ BOC.

(2) The triangles with vertex O are ∆ AOB, ∆ AOC and ∆ BOC.

(3) The triangles with vertex A are ∆ AOB, ∆ AOC and ∆ ABC.