Question

∆PQR ≅ ∆ABC, if PQ = 5 cm, ∠Q = 40° and ∠P = 80°, calculate the value of ∠C.​

Answer 1

Answer:

angle c is 60

Step-by-step explanation:

angle A PLUS ANGLE B PLUS ANGLE C

A+B+C equals 180

80+40+angle c equals 180

180 -120 = 60

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Answer 2

Answer:

In △PQR using angle sum property of triangle

∠P+∠Q+∠R=180

80 +40 +∠R=180

⇒∠R=180 −120 =60

Now △PQR≅△ABC

As corresponding parts of congruent triangle are equal

∴AB=PQ=5cm and ∠C=60

Step-by-step explanation:

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