Type of triangle: 1 Mark
Properties: 2 Marks
The sides of the triangle are given as 6m, 6m, 8m.
Now two sides of the triangle are equal 6m, 6m.
We know that if a triangle has two sides equal then the triangle is isosceles.
Hence, the given triangle is an isosceles triangle.
Also if two sides of a triangle are equal then their respective angles are also equal.

Steps: 2 Marks
Answer: 1 Mark
Given that:
The wheel rotates 6 and a half times in one second.
We know that in one revolution there are 4 right angles.
$\therefore$ In 6 revolutions, the number of right angles = 6$\times$4 = 24
$\therefore$ In half revolution, the number of right angles = $\frac{1}{2}$$\times 4$ = 2
The total number of right angles = 24 + 2 = 26.
The wheel went through 26 right angles. 

Each Option: 1 Mark
Given that:
Line l is perpendicular to line m.
a) We can clearly see from the above diagram that CE = 5-3 = 2 units
Also, EG = 7-5 = 2 units
$\therefore$ CE = EG = 2 units
b)As we have seen above CE = EG
So, E is the mid-point of line CG.
$\therefore$ Line PE bisects CG.
c) We can see from the above figure that
BE = 5-2 = 5 units
HE = 8-5 = 3 units
$\therefore$ E is the mid-point of the line BH.
Also given that line m is perpendicular to the line l.
$\therefore$ PE is the perpendicular bisector of the line segment BH.
Also, we have seen above that PE is also the perpendicular bisector of line segment CG.
$\therefore$ The required line segments are BH and CG.

Steps: 3 Marks
Quadrilateral's name: 1 Mark
Given that:
A man runs in a particular path, in such a way that it is a quadrilateral.
Also, the opposite sides are equal and opposite angles are equal.
Also, the opposite sides are parallel.
So the given quadrilateral can either be a rectangle, parallelogram, or a square.
But the adjacent sides are not equal.
Therefore it will either be a parallelogram or a rectangle.
If all the angles of the quadrilateral are 90${}^{\circ }$, then the quadrilateral is a rectangle, otherwise, it is a parallelogram.