Question

An architect constructs a small model of a frame of a house using wooden sticks. The incomplete face of the model roof is shown below, where two parts, PR¯¯¯¯¯¯¯¯ and ST¯¯¯¯¯¯¯, are connected. The architect wants to connect P to S and P to T by using two other different wooden sticks.

Answer 1

Join PR and ST so that they form a right angle with a vertex at the midpoint of ST.

1) In order to get it, we need to bisect the line segment ST. We can bisect that by intersecting ST with PR with a right angle right on the midpoint.

2) Thus, the answer is:

Join PR and ST so that they form a right angle with a vertex at the midpoint of ST.

3) Hence, the answer is "C"