Find the measurements of cuboid in the adjacent figure.Considering the distance between every two consecutive dots to bel unit.Also draw a side view, front view and top view with proportional measure ments.

Consider the distance between two consecutive dots to be 1 cm and draw the front view, side view and top view of the following 3-D figures.

What other errors can you find while measuring the length of line segment ? For example, to find the length of a pencil, the eye should be correctly positioned as shown in the figure i.e. just verticially above the mark for both points. Other wise there may be an error due to angular viewing.

Draw a triangle ABC and mark the midpoints E and F of two sides of triangle. bar(AB) and bar(AC) respectively. Join the point E and F as shown in the figure. Measure EF and the third side BC of the triangle. Also measure angleAEF and angleABC . We find angleAEF = angleABC and bar(EF)=(1)/(2)bar(BC) As these are corresponding angles made by the transversal AB with lines EF and BC, we say EF"||"BC.

Two boys are on opposite sides of a tower of 200 m height. They measure the angle of elevation of the top of the tower as 45^@ and 60^@ respectively. Find the distance throught which the boys are separated.

In the adjacent figure, ABC is a triangle in which angleB = 50^(@) and angleC = 70^(@) . Sides AB and AC are produced. If ‘z’ is the measure of the angle between the bisectors of the exterior angles so formed, then find 'z'.