# Constructions (Exercise 11.1)

## EX 11.1 QUESTION 1.

Construct an angle of 90° at the initial point of a given ray and justify the construction.

Solution:

## EX 11.1 QUESTION 2.

Construct an angle of 45° at the initial point of a given ray and justify the construction.

Solution:

## EX 11.1 QUESTION 3.

Construct the angles of the following measurements
(i) 30°
(ii) 22 $\frac { 1 }{ 2 } \circ$
(iii) 15°
Solution:

## EX 11.1 QUESTION 4.

Construct the following angles and verify by measuring them by a protractor
(i) 75°
(ii) 105°
(iii) 135°
Solution:

## EX 11.1 QUESTION 5.

Construct an equilateral triangle, given its side and justify the construction.
Solution: