- ARegular polygon
- BConvex polygon
- CConcave polygon
- DEquiangular polygon
Step-by-Step Solution
A regular polygon has all sides equal AND all angles equal — for example, an equilateral triangle or a square.
Answer: A) Regular polygon
Which type of polygon has all sides equal AND all angles equal?
Class 8Understanding QuadrilateralsQuadrilaterals
Key idea: The quadrilateral family tree
Order from most general to most special:
```
Quadrilateral
├── Trapezium (one pair of parallel sides)
├── Kite (two pairs of adjacent equal sides)
└── Parallelogram (two pairs of parallel sides)
├── Rectangle (4 right angles)
│ └── Square (4 right angles + all sides equal)
└── Rhombus (4 equal sides)
└── Square (also)
```
A square is BOTH a rectangle and a rhombus — it's the most special kind of parallelogram. A rectangle and a rhombus are both parallelograms. Trapeziums and kites are quadrilaterals but not parallelograms.
```
Quadrilateral
├── Trapezium (one pair of parallel sides)
├── Kite (two pairs of adjacent equal sides)
└── Parallelogram (two pairs of parallel sides)
├── Rectangle (4 right angles)
│ └── Square (4 right angles + all sides equal)
└── Rhombus (4 equal sides)
└── Square (also)
```
A square is BOTH a rectangle and a rhombus — it's the most special kind of parallelogram. A rectangle and a rhombus are both parallelograms. Trapeziums and kites are quadrilaterals but not parallelograms.
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More Class 8 Understanding Quadrilaterals practice
In a parallelogram, the bisectors of two adjacent angles meet at a point. The angle…All four angles of a quadrilateral are equal. What is the measure of each angle in…Assertion (A): The diagonals of a rhombus bisect each other at right angles. Reason (R):…An exterior angle of a regular polygon is 72°. How many sides does the polygon have?In quadrilateral ABCD, ∠A = 78°, ∠B = 104° and ∠D = 95°. Find the angle marked at C.