Question

13. ΔPQR ≅ ΔABC, if PQ = 5 cm, ∠Q = 40° and ∠P = 80°, calculate the value of ∠C.​

Answer 1

Answer:

your answer is ∆C = 60°

Step-by-step explanation:

in ∆PQR using angle sum property of triangle

angle p + angle q + angle r = 180°

80° + 40° + angle r = 180°

=> angle r = 180° - 120° = 60°

now ∆ PQR =~ ∆ABC

as corresponding parts of congruent triangle are equal

AB = PQ = 5cm and angle C = 60°

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Answer 2

Answer:

your answer is ∆C = 60°

Step-by-step explanation:

in ∆PQR using angle sum property of triangle

angle p + angle q + angle r = 180°

80° + 40° + angle r = 180°

=> angle r = 180° - 120° = 60°

now ∆ PQR =~ ∆ABC

as corresponding parts of congruent triangle are equal

AB = PQ = 5cm and angle C = 60°