if u want one wid steps . refer to this
We know that,
And, 
Mark a point ‘A’ representing 2 on number line. Now, construct AB of unit length perpendicular to OA. Then, taking O as centre and OB as radius, draw
an arc intersecting number line at C.
2.Construction of √(3.5):
1) Draw a right Triangle, in which the two perpendicular sides measure one unit each. The hypotenuse of this triangle measures √2 units. Bisect this into two equal parts, such that each measure (√2)/2 units.
2) Draw another right triangle, in which the two perpendicular sides measure √2 and 1 unit. The hypotenuse of this triangle measure √3 units.
3) Draw another right triangle, in which the two perpendicular sides measure √3 and (√2)/2 units. The hypotenuse of this triangle measures √(3.5) units.
do other parts with the help of these answers
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