1. Problem 1 : Draw an equilateral triangle of 75 mm sides and inscribe a circle in it. Draw the
projections of the figure, when its plane is vertical and inclined at 30º to the VP and one of the
sides of the triangle is inclined at 45º to the HP.
a1’
a’
11’
1’ 121’ 21’
12’ 2’
c1’
11’ 3’ c’ 111’
31’
10’ 4’ 101’ 41’
9’ 5’ 91’ 51’
8’ 6’ 81’ 61’
7’ 71’
b’
30º b1’
45º
X Y
a b c
10 9 8 1 2 3 4
11 12 7 6 5