- Write a paragraph proof for the following conjecture. Given: bisects . . Prove: is a right triangle. Answer: Angle PQR equals 90 degrees Given:
if pqs is 45 degrees then sqr is 45 degrees by the definition of a bisector. pqs is equal to sqr becuase of definition of congruent angles therefore pqs + sqr= 90 by the addition property. what this means is that pqr is a right angle because of the definition of a right angle
Answer with Step-by-step explanation:
We are given that in triangle PQR
QS bisect the angle PQR
\(\angle PQS=45^{\circ}\)
We have to prove that \(\angle PQR=90^{\circ}\)
\(\angle PQS=\angle PQR\)
Because QS bisect the angle PQR.
Therefore, \(\angle PQR=45^{\circ}\)
\(\angle PQR=\angle PQR+\angle PQS\)
Substitute the values then we get
\(\angle PQR=45+45\)
\(\angle PQR=90^{\circ}\)
Hence, triangle PQR is right triangle because one angle of triangle is of 90 degrees.
Hence, proved.