Din cauza secetei, nivelul apei in lac a scăzut cu 16 cm. După ploaie, nive- lul apei a crescut cu 9 cm și este de 658 cm. Care a fost nivelul apei in lac până la seceta?

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Which term applies to agb and dge? a. obtuse b. supplementary c. complementary d. vertical

Which of these angles are supplementary? a. 100o and 90o b. 78o and 102o c. 54o and 146o d. 12o and 78o