NCTB Class 6 Math Chapter Six Exercise 6.2 Solution by Math Expert. Bangladesh Board Class 6 Math Solution Chapter 6 “Basic Concept of Geometry “Exercise 6.2 Solution.

Board |
NCTB |

Class |
6 |

Subject |
Mathematics |

Chapter |
6 |

Chapter Name |
”Basic Concept of Geometry” |

Exercise |
6.2 Solution |

**Exercise:- 6.2**

**(a) The measure of a right angle is —–.**

**Solution:-** 90^{0}

**(b) The measure of an acute angle is —– than that of a right angle.**

**Solution:- **Less.

**(c) The measure of an obtuse angle is —– than that of a right angle.**

**Solution:**– More.

**(d) An angles of a right angled trained triangle is — and the other two angles are —– angles.**

**Solution:-** 90^{0}

**(e) —- triangle has an obtuse angle and — acute angles.**

**Solution:- **Obtuse, other two.

**(f) A triangle has an obtuse angle and — is an acute angled triangle.**

**Solution:-** 90^{0}

**(2) Which country did the scholar Euclid belong to?**

**Solution:- **(c) Greece.

**(3) What is the name of the book written by Euclid on the theme of geometry?**

**Solution:- **(b) Elements.

**(4) In which century B.C. did Euclid put down the definition of geometric measurement process and different procedures in his book ‘Elements’?**

**Solution:-** (a) 300.

**(5) Draw the following angles:**

**(6) On assumption, draw acute, obtuse and right angled triangles.**

**(7) The measurement of a few angles are given below. In each case, find the corresponding complementary angle and draw it.**

**(8) The measurement of a few angles are given below. In each case, find the corresponding supplementary angle and vertically opposite angle in the same figure. Also, marks the vertically opposite angle of the supplementary angle.**

** **

**(13) A line :**

**solution:- **

A line — (d) (i), (ii), and (iii) are correct.

**(14) Draw a few right angled triangles. In each triangle, measure and add the angles other than the right angle. In each case, what is the sum of the three angles?**

**(15) Draw a quadrilateral and measure the lengths of its four sides and two diagonals. Also, measure the four angles of the quadrilateral and find their sum.**

**(17) One assumption, draw a square with sides of length 4cm.**

**(19)**

**(20)The lines, AB and CD intersect at the point 0.**