Drag and drop a statement or reason to each box to complete the proof. Given: PQ¯¯¯¯¯≅PR¯¯¯¯¯ Prove: ∠Q≅∠R Triangle P Q R with segment P Q and segment P R each having one tick mark. Statement Reason PQ¯¯¯¯¯≅PR¯¯¯¯¯ Given Draw PM¯¯¯¯¯¯ so that M is the midpoint of QR¯¯¯¯¯ . Two points determine a line. Reflexive Property of Congruence △PQM≅△PRM ∠Q≅∠R

We prove this by two methods, in a simple way if in triangle two sides are equal then it becomes an isosceles triangle. In triangle PQR sides PQ and PR are equal i.e PQ=PR then PQR becomes an isosceles triangle.

which implies its two base angles are equal gives ∠Q≅∠R

Now, By Congruency postulate,

It is given that draw a line segment PM such that M bisect the line QR i.e M is the mid-point of QR.

In ΔPQM and ΔPRM,

PQ=QR (Given)

QM=MR (Given)

PM=PM (Common)

It gives all the sides equal. Hence, by SSS Postulate, which states that if three sides of two triangles are congruent then these two triangles are congruent.

∴ ΔPQM≅ΔPRM

By CPCT, ∠Q≅∠R