What is ABCD?

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1 Answer
Mar 20, 2018

57

Explanation:

First, you should find "oA", which is "AC"/2 = 3.

You know that "oB"=4.

Now you use the Pythagorean theorem which is a^2 + b^2 = c^2.

3^2 + 4^2 = c^2 gives you c="AB"="BC"=5. That is lines "AB" and "BC" because the kite is symmetrical.

Now you should find "AD" by doing 3^2 + (23.3)^2 = c^2 giving you 23.5. This is "AD" and "CD".

Now add 23.5+23.5+5+5 which gives you a perimeter of 57.