What is the degree measure of angle BCD A B C D E A 120 B 125 C 130 D 135 E 140

# What is the degree measure of angle bcd a b c d e a

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4 : 5. What is the degree measure of angleBCD?ABCDE(A)120(B)125(C)130(D)135(E)1402011 AMC 10B, Problem #17—“What is angleEAB?” Diﬃculty: Medium Hard CCSS-M: G-C.2. Identify and describe relationships among inscribed angles, radii, and chords. 17
RectangleABCDhasAB= 6andBC= 3.PointMischosen on sideABso thatAMD=CMD. What is thedegree measure ofAMD? 2011 AMC 10B, Problem #18—2011 AMC 12B, Problem #10—“What properties doesCMDhave?” A B C D M 6 3 Diﬃculty: Medium Hard CCSS-M: G-SRT.5.Use congruence and similarity criteria for triangles to solve problems and to proverelationships in geometric figures.7.G.5. Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problemto write and solve simple equations for an unknown angle in a figure. 18
4 : 5. What is the degree measure of angleBCD?ABCDE(A)120(B)125(C)130(D)135(E)1402011 AMC 10B, Problem #19—“What is angleEAB?” Diﬃculty: Medium Hard CCSS-M: