1. Problem 9 : A plate having shape of an isosceles triangle has base 50 mm long and
altitude 70 mm. It is so placed that in the front view it is seen as an equilateral triangle of
50 mm sides and one side inclined at 45º to xy. Draw its top view
An isosceles triangle can be
seen as a equilateral triangle in Step 2:F.V. (equilateral Step 3: Incline a1’b1’ at 45º to
the F.V. only when its surface is triangle) is drawn first the H.P.
inclined to VP. So for the first
view keep the plane // to VP,
with 50 mm long edge
perpendicular to the HP.
c1’
a’ a1’
a1’
c’ c1’
50
b’ b1’
b1’ 45º
70 a1 b1
a.b c a.b
c c1