Question

The diagonal BD cuts the quadrilateral

ABCD into a right triangle, ABD, and an
equilateral triangle BCD. The dimensions are
given in inches. How many inches long is
DC?
Hint: Equilateral triangles have three equal
sides

Answer 1

answer is 13 inch.,

Explanation:

BCD is equilateral triangle so all side is equal.

and ABD is right angled triangle so. use pythagoras theorem.

BD = 13 inch then DC also 13 inch