www.ck12.org Trapezoids Practice Worksheet Visit CK12.org for Free Online Practice 1. Find the unknown angle in the following trapezoid. a = ___◦ 6 Answer: 2. In the given isosceles trapezoid ABCD measure of 6 DCB = 72◦ . TRUE or FALSE: 3. Can the parallel sides of a trapezoid be congruent? TRUE or FALSE: 1 www.ck12.org 4. The area of a trapezoid is equal to half of the product of the sum of parallel and non-parallel sides. TRUE or FALSE: 5. Find the unknown angle in the following trapezoid. a = ___◦ 6 Answer: 6. Find the value of the missing variable. 2 www.ck12.org a. b. c. d. x = 10 x=6 x=7 x=4 7. Find the lengths of the diagonals of the trapezoid below to determine if it is isosceles. A(−3, 3), B(2, −2),C(−6, −6), D(−7, 1) TRUE or FALSE: 8. Find the unknown angle in the following trapezoid. a = ___◦ 6 Answer: 9. Find the length of the mid-segment or missing side. a. b. c. d. 8 6 5 7 3 www.ck12.org 10. If ABCD is an isosceles trapezoid, then: a. 6 A = 6 B b. 6 C = 6 D c. Both A and B d. None o f the above 4 www.ck12.org Answer Keys 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 28 TRUE No FALSE 45 x=4 Yes 72 5 Both A and B 5 www.ck12.org Printed: March 9, 2020 6