In a parallelogram ABCD, angle A and angle B are in the ratio 1:2. Find angle A.

2024

In a parallelogram ABCD, angle A and angle B are in the ratio 1:2. Find angle A.

  1. A.

    30°

  2. B.

    45°

  3. C.

    60°

  4. D.

    More than one of the above

  5. E.

    None of the above

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Show answer & explanation

Correct answer: C

Step 1: In a parallelogram, adjacent angles are supplementary, meaning they add up to 180°.

Step 2: Let angle A be x and angle B be 2x, as per the given ratio 1:2.

Step 3: Since angle A + angle B = 180°, we have x + 2x = 180°.

Step 4: Simplify: 3x = 180° → x = 60°.

Step 5: Therefore, angle A is 60°.

हिन्दी उत्तर:

चरण 1: समांतर चतुर्भुज में, आसन्न कोणों का योग 180° होता है।

चरण 2: माना कि कोण A = x और कोण B = 2x, जैसा कि 1:2 के अनुपात के अनुसार है।

चरण 3: चूँकि कोण A + कोण B = 180°, इसलिए x + 2x = 180°।

चरण 4: सरल करने पर: 3x = 180° → x = 60°।

चरण 5: अतः कोण A = 60° है।

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