In quadrilateral ABCD, find the length of CE?
ABCD is a quadrilateral. Point O is along AD. A semicircle has a diameter along AD and is tangent to the sides AB, BC, and CD. If AB = 9, CD = 16, and AO = OD, what is the length of AD?
Quadrilateral ABCD has the following properties:
Angle B and D are each right angle AB and BC has the same length 1 unit.
What is the area of quadrilateral.
In quadrilateral ABCD, BC = CD. If ∠BAC = 3x, ∠BCA = x, ∠CAD = 5x, and ∠ACD = 3x, what is the value of x?
ABCD is a square with side length R. Find the radius of the red circle in terms of R?
Quadrilateral ABCD has AD = BC, ∠A + ∠B = 90°, AB = 20, CD = 10, as shown below.
What is the area of ABCD?