Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.

Page 1 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=1' data-page='1' class='cut-thumb lazyload' alt='Page 1: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/1.jpg' width='140' height='200' /> Lesson 9.1: Properties of Parallelograms

Page 2 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=2' data-page='2' class='cut-thumb lazyload' alt='Page 2: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/2.jpg' width='140' height='200' /> Page 421

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Page 5 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=5' data-page='5' class='cut-thumb lazyload' alt='Page 5: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/5.jpg' width='140' height='200' /> SummaryLesson 9.1

Page 6 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=6' data-page='6' class='cut-thumb lazyload' alt='Page 6: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/6.jpg' width='140' height='200' /> Page 424

Page 7 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=7' data-page='7' class='cut-thumb lazyload' alt='Page 7: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/7.jpg' width='140' height='200' /> Page 425

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Page 9 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=9' data-page='9' class='cut-thumb lazyload' alt='Page 9: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/9.jpg' width='140' height='200' /> ll

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Page 10 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=10' data-page='10' class='cut-thumb lazyload' alt='Page 10: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/10.jpg' width='140' height='200' /> Page 434

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Page 12 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=12' data-page='12' class='cut-thumb lazyload' alt='Page 12: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/12.jpg' width='140' height='200' /> Page 437

Page 13 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=13' data-page='13' class='cut-thumb lazyload' alt='Page 13: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/13.jpg' width='140' height='200' /> Page 438

Page 14 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=14' data-page='14' class='cut-thumb lazyload' alt='Page 14: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/14.jpg' width='140' height='200' /> Page 15 <img data-url='document/lesson-91-properties-of-parallelograms-if-a-quadrilateral-is-a-parallelogram.html?page=15' data-page='15' class='cut-thumb lazyload' alt='Page 15: Lesson 9.1: Properties of Parallelograms...If a quadrilateral is a parallelogram, then its opposite angles are congruent. Prove that the opposite angles of a parallelogram are congruent.' loading='lazy' src='data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg==' data-src='https://reader039.cupdf.com/reader039/viewer/2022033118/5e98d81c2db2be46b277fb76/html5/thumbnails/15.jpg' width='140' height='200' /> Assignment:1. Constructing a square inscribed in a circle2. Constructing a regular hexagon inscribed in a circle