10. In isosceles AABC shown below, AC is congruent to BC as shown. Side AC has been extended through point C to point D. Explain why the measure of ZBCD must be twice the measure of ZA. B

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter2: Parallel Lines
Section2.CT: Test
Problem 9CT: a Given that the polygon shown has six congruent angles, this polygon is known as an __________...
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10. In isosceles AABC shown below, AC is congruent to BC as shown. Side AC has been extended through
point C to point D. Explain why the measure of ZBCD must be twice the measure of ZA.
B
Transcribed Image Text:10. In isosceles AABC shown below, AC is congruent to BC as shown. Side AC has been extended through point C to point D. Explain why the measure of ZBCD must be twice the measure of ZA. B
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