diff --git a/w3.html b/w3.html
index f5dae99429bec6ade2edb914cd0a1533cb587f56..c9910da25fcd6ff5ef11989b1641c65c58b4ad6d 100644
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@@ -156,6 +156,8 @@
               <p> If you want to measure the distance between two objects, use 'Measure' tab in 'Inspect'.</p>
               <h5>8. How to joint: Press 'J' key</h5>
               <p> </p>
+              <img src="image/assignment/w3/016.png" width="1110" alt="How to draw a construction line">
+              <img src="image/assignment/w3/017.png" width="1110" alt="How to draw a construction line">
               <h5>9. How to make a hole: Press 'H' key</h5>
               <p> </p>
               <img src="image/assignment/w3/020.png" width="1110" alt="How to draw a construction line">