differentiate dividend and divisor in Mult. and div. cplx. num. polar…

… forms

exercises/multiplying_and_dividing_complex_number_polar_forms.html

@@ -39,6 +39,7 @@
 			</div>
 			<p class="question">Multiply the following complex numbers, marked as <span class="hint_blue">blue</span> dots on the graph:</p>
 			<p><code><var>LEFT_BRACKET</var><var>A_REP</var><var>RIGHT_BRACKET</var> \cdot <var>LEFT_BRACKET</var><var>B_REP</var><var>RIGHT_BRACKET</var></code></p>
+			<p>(Your current answer will be plotted in <span class="hint_orange">orange</span>.)</p>
 
 			<!-- TODO: use the dots in hints? -->
 			<div class="graphie">
@@ -149,6 +150,10 @@
 			</div>
 			<p class="question">Divide the following complex numbers:</p>
 			<p><code>\dfrac{<var>A_REP</var>}{<var>B_REP</var>}</code></p>
+			<p>
+				(The dividend is plotted in <span class="hint_blue">blue</span> and the divisor in plotted in <span class="hint_green">green</span>.
+				Your current answer will be plotted <span class="hint_orange">orange</span>.)
+			</p>
 
 			<!-- TODO: differentiate the dots! -->
 			<div class="graphie">
@@ -167,7 +172,7 @@
 				});
 
 				circle( [B_REAL, B_IMAG], 1 / 4, {
-					fill: KhanUtil.BLUE,
+ 				fill: KhanUtil.GREEN,
 					stroke: "none"
 				});