53 questions · Class 8 · CBSE
A quadrilateral has angles (x + 10)°, (2x − 20)°, (3x)°, and (x + 30)°. Find all angles.
Explain with reasons whether a kite can be a parallelogram.
A regular polygon has each exterior angle equal to 24°. Find the number of sides and each interior angle.
The angles of a quadrilateral are x, 2x, 3x, and 4x. Find the value of x and all angles.
A polygon has 20 diagonals. Find the number of sides.
Explain why every square is both a rectangle and a rhombus.
Prove that the sum of all exterior angles of any polygon is 360°.
A floor tile is shaped like a square with side 25 cm. Find the total boundary length of four such tiles placed in a straight line.
The interior angle of a regular polygon is 150°. Find the number of sides.
A kite has two pairs of adjacent equal sides measuring 8 cm and 12 cm. Find its perimeter.