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# Geometry

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What is the perimeter, in cm, of quadrilateral ABCD if $AB \perp BC$, $DC \perp BC$, AB = 9 cm, DC = 4 cm, and  BC = 12 cm?

Nov 16, 2021

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What is the perimeter, in cm, of quadrilateral ABCD?

Hello Guest!

$$AB \perp BC, DC \perp BC$$

The perimeter is (9 + 12 + 4 + $$\sqrt{(9-4)^2+12^2}$$) cm = 38 cm.

!

Nov 17, 2021