Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 4 - Section 4.3 - The Rectangle, Square, and Rhombus - Exercises - Page 193: 1


(a) rhombus (b) rectangle

Work Step by Step

(a) A quadrilateral with four congruent sides is a rhombus. (b) A quadrilateral that is a parallelogram with a right angle is a rectangle. Note that if one angle of a parallelogram is a right angle, then the opposite angle is a right angle. Then all four angles must be right angles since the sum of the angles is $360^{\circ}$
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