Which amongst the following is not a polyhedron?
The correct answer is (c) Justification By the definition, a polyhedron is regular if its faces are congruent regular polygons... View Article
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Triangle is a polygon whose sum of exterior angles is double the sum of interior angles. State whether the statement is true (T) or (F) false.
The given statement is True Justification As we know, by angle sum property of triangle, the sum of interior angles of... View Article
A quadrilateral has two diagonals. State whether the statement is true (T) or (F) false.
The given statement is True Justification The Sum of all the angles of a quadrilateral is 360o. According to the angle sum... View Article
Sum of all the angles of a quadrilateral is 1800. State whether the statement is true (T) or (F) false.
The given statement is False Justification Sum of all the angles of a quadrilateral is 360o. According to the angle sum property... View Article
All rhombuses are squares. State whether the statement is true (T) or (F) false.
The given statement is False Justification The angels of a rhombus are not equal to 90o so all rhombuses are not... View Article
All rectangles are parallelograms State whether the statement is true (T) or (F) false.
The given statement is True Justification All the properties of a parallelogram are satisfied by the rectangle. All rectangles have all... View Article
All kites are squares. State whether the statement is true (T) or (F) false.
The given statement is False Justification A kite is a special sort of quadrilateral, in which 2 pairs of adjacent sides are equal... View Article
All squares are rectangles. State whether the statement is true (T) or (F) false.
The given statement is True Justification All squares are rectangles because it has 4 right angles. Square and rectangle are two-dimensional,... View Article
All angles of a trapezium are equal. State whether the statement is true (T) or (F) false.
The given statement is False Justification All angles of a trapezium are not equal. The sum of the interior angles of the... View Article
The polygon in which sum of all exterior angles is equal to the sum of interior angles is called __________.
The polygon in which the sum of all exterior angles is equal to the sum of interior angles is called... View Article
In trapezium ABCD with AB||CD, if ∠A = 100o, then ∠D = __________.
In trapezium ABCD with AB||CD, if ∠A = 100o, then ∠D =80o. Justification We know that, in trapezium adjacent angles... View Article
If only one diagonal of a quadrilateral bisects the other, then the quadrilateral is known as __________.
If only one diagonal of a quadrilateral bisects the other, then the quadrilateral is known as kite. Kite A kite... View Article
Adjacent angles of a parallelogram are __________.
Adjacent angles of a parallelogram are supplementary. Justification Let us consider Parallelogram ABCD. To prove: ∠A + ∠B = 180... View Article
If one diagonal of a rectangle is 6 cm long, length of the other diagonal is __________.
If one diagonal of a rectangle is 6 cm long, length of the other diagonal is 6cm. Justification Because diagonals... View Article
A rectangle whose adjacent sides are equal becomes a __________.
A rectangle whose adjacent sides are equal becomes a Square. Sqaure A square is a four-sided polygon that has all... View Article
A polygon having 10 sides is known as __________.
A polygon having 10 sides is known as Decagon. In geometry, a decagon is a polygon with 10 sides. Hence,... View Article
Diagonals of a rectangle are __________.
The diagonals of a rectangle are equal. Rectangle A rectangle is a type of quadrilateral that has its parallel sides... View Article
A nonagon has __________ sides.
A nonagon has 9 sides. Nanogan A nonagon contains 9 straight sides and 9 vertices connecting these sides. The sum... View Article
The adjacent sides of a parallelogram are 5 cm and 9 cm. Its perimeter is __________.
The adjacent sides of a parallelogram are 5 cm and 9 cm. Its perimeter is 28 cm. Justification We... View Article
If the diagonals of a quadrilateral bisect each other, it is a __________.
If the diagonals of a quadrilateral bisect each other, it is a Parallelogram. Parallelogram Aparallelogram is a two-dimensional geometrical shape, whose... View Article
