Step 1) Make sure you’re workspace units are millimeters
Step 2) Create a 3 point arc. Dimensioned to a radiu of 30, then add a vertical line:
Step 3) Dimension the vertical line:
Step 4) Use the spline tool to create this :
Step 5) Add 2 circles and dimension both of them to 12 (smaller ) and 50 (outer) as shown below:
Step 6)
Step 1) Use the polygon tool to make a pentagon (5 sides)
Step 2) Dimension the side to 25
Step 3) Add a point then use the midpoint constraint on it
Step 4) Draw a construction line to the midpoint
Step 5) Use the cut tool to remove half the polygon
Step 6) Add 2 lines
Do Now
Step 1) Create the right triangle above. The hypotenuse dimensioned to 30, the vertical altitude is a construction line and the the other leg is dimensioned to 21.
Step 2) Mirror the triangle over the construction line
Result :
Step 3) Circumscribe circle that is dimensioned to 42
Final result:
