Question

solve the following question

Answer 1

angle BPQ + angle PQD =180°
1/2 BPQ + 1/2 PQD = 90°

••• angle TPQ + angle PQT = 90°

angle TPQ + angle PQT + angle PTQ = 180° (angle sum property of a triangle)

90° + angle PTQ = 180°
angle PTQ= 90°

HENCE PROVED that angle PTQ =90°