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Kriti

If AB ∥ DC, ABCD cannot be non-convex because consecutive interior angles sum to 180°, preventing reflex angles. If AB = CD or ∠A = ∠C, it can be non-convex, such as in an arrowhead shape. Class 9 Ganita Manjari Part ...

Kriti

The algorithm handles this partially or ambiguously because Step 3 explicitly specifies adding “the two digits.” It lacks instructions for processing the remaining leftmost columns where the 3-digit number has no digits left. Cbse Class 9 Maths Ganita Manjari Part 2 ...

Kriti

The proposition is true because square angles are 90 degrees. Its converse (“If all angles of a quadrilateral are equal, then it is a square”) is false; a rectangle provides a counterexample.