Working with Animations
(6)Select line segments AB and DE, enter 90 in the measurement box, and tap the check box next to the measurement box.
•This fixes the angle between AB and DE at 90 degrees.
(7)Select only line segments DE and DC, and then tap the down arrow next to the measurement box.
(8)Tap the e icon, and then select the check box to the right of the measurement box.
• This makes line segments DE and DC congruent in length.
A highlighted check box indicates the measurement is fixed (constrained).
(9)Select point E and line segment AB.
(10)Tap [Edit], [Animate], and then [Add Animation].
(11)Tap the screen to deselect the currently selected items.
(12)Select point D.
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