Isosceles Triangle Exp: Ex. 5B

DIRECTIONS:
1) Select the SEGMENT WITH GIVEN LENGTH [icon]/images/ggb/toolbar/mode_segmentfixed.png[/icon] tool. Then plot a point off to the right. [br] Enter a length of 4.[br] [br]2) Select the MOVE [icon]/images/ggb/toolbar/mode_move.png[/icon] tool. Now touch the segment. In the style bar that appears, select the "Aa" [br] icon. Check "Value" to show the length of this segment. Move points [i]A[/i] and [i]B[/i] around to verify this [br] segment has an invariant length = 4. [br][br]3) Select the SEGMENT WITH GIVEN LENGTH tool again. Then select point [i]A[/i]. [br] Enter "4" in the pop-up box that appears. [br][br]4) Select the MOVE tool once again and move point [i]C[/i] around. [br][br]5) Now go to the STEPS window. Hide the two segments you've just constructed in steps (1) and (3).[br] Thus, the only items that should remain are points [i]A[/i], [i]B[/i], and [i]C[/i]. [br][br]6) Select the POLYGON tool. Construct triangle [i]ABC[/i]. Then select the MOVE tool and click on the two [br] congruent sides and display these segment lengths (same way you did in exercise (2)). [br][br]7) Use the ANGLE tool to measure this triangle's 3 angles. Then select MOVE and move the vertices of [br] this triangle around.
8)
What do you notice?
[color=#0000ff]When you're done (or if you're unsure of something), feel free to check by watching the quick silent screencast below the applet. [/color]
Quick (Silent) Demo
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Information: Isosceles Triangle Exp: Ex. 5B