Congruent triangles have equal corresponding sides and angles
Angles RAT and QAS are congruent
Given that:
AR= AQ and RT=QS
Subtract QS from both sides of the second equation
RT-ST=QS-ST
The above equation means that:
RS = QT or
RS = TQ
In triangle ARQ,
Angles R and Q are congruent because the base angles of an isosceles triangle are congruent.
So, we have:
Angle R = Angle Q
Also,
Angle ARS is congruent to ATQ.
The above means that:
Side lengths AT and AS are congruent
So, we have:
AT=AS ---- The base angles of an isosceles triangle ATS
Because of the above highlights,
Angle 1 = Angle 3
Add angle 2 to both sides
Angle 1 + Angle 2 = Angle 3 + Angle 2
So, we have:
Angle RAT = Angle QAS
Hence, angles RAT and QAS are congruent
Read more about congruent triangles at:
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