Question

1. Construct an angle of 90° at the initial point of a given ray and justify the construction
2. Construct an angle of 45° at the initial point of a given ray and justify the construction
3. Construct the angles of the following measurements:​

Answer 1

1. 1st angle is 90degrees means it is a right angle triangle

• a+b+c=180degrees
• then a=90degrees,b=46degrees,c=x
• 90drgrees+45degrees+x=180degrees
• 90+45+x=180
• 135+x=180
• x=180-135
• x=45