Do now

Step 1) Clear out an old do now. Create a center point circle with a radius of 20:

Step 2)  Make a diameter

Step 3) Use the scissor tool to cut the bottom half of the circle off

Step 4)  Make a  vertical construction line right up the middle of the circle

step 5) Add 2 lines symmetric about the construction line

Step 6) the angle should be 40 . How to dimension an angle

result :

step 7) Use the scissors tool to cut out the center arc.

 

step 8) MIrror the shape over teh diameter:

 

Step 9) Extrude 1 half of shape by 45 MM

Step 10) Extrude the other half by 27 MM

 

Part II . Your own shape

After you take a screenshot of the above shape, do a different type of 3-d model. You can use anything else whether its a revolve, a sweep  or a loft

To get full credit on this you must use either a sweep or a loft as your 2nd 3-d shape.