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ToggleNCERT Solution For Class 6, Maths, Chapter 4, Basic Geometrical Ideas involves knowledge of basic shapes and geometry. Students can through the each exercise for practicing questions present in chapter 4, Basic Geometrical Ideas. Class 6 maths, ch.4 contains total six exercises given below.

the solutons of NCERT class 6 maths chapter 4, Basic Geometrical Ideas involves ex.4.1, ex.4.2,ex.4.3, ex.4.5 and ex.4.6.

## NCERT Solution For Class 6, Maths, Chapter 4, Basic Geometrical Ideas

**Key points**

**Point:** A point determines a location and i is usually denoted by a capital letters in given figure.

**Line segment:** A line segment corresponds to the shortest distance between two points. The line segment joining points A and B is denoted by $\overline{AB}$ .

**Intersecting lines:** Two distinct lines meeting at a point are called intersecting lines.

**Parallel lines: **if the two lines do not meet in a plane, they are said to be parrel lines.

**Ray: it **is a portion of line starting at a point and going in one direction endlessly.

**Curve: **Any drawing (straight or non-straight) done continuously without lifting the pencil may be called a curve.

**Closed and open curve: **A curve is said to be closed if its ends are joined. Otherwise, it is said to be open.

**Polygon**: it is a simple closed curve made up of line segments.

**Triangle:** A triangle is a three-sided polygon.

**Quadrilateral** : it is a four-sided polygon.

**Circle: **A circle is the path of a point moving at the same distance (the radius) from a fixed point (the centre). Here, the fixed point is the **centre**, the fixed distance is the **radius**.

**Diameter: **it goes straight across the circle, through the centre of circle. The diameter of a circle divides it into two semi-circles.

**Circumference:** the distance once around the circle is the circumference.