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I need help with these short answers #19 - #21

I need help with these short answers #19 - #21-example-1

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In a diagram to mark that two lines are perpendicular, we put the following symbol:

in one of the angles that they form.

Also, if two lines are congruent, we mark them with the same symbol.

From the given diagram we get:


AC\perp BD,
AD\cong CD\text{.}

Answer:

19.- T.

20.- T.

21.- F.

I need help with these short answers #19 - #21-example-1
User Pegi
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