WebbSolution: You know what to do, so just do it. 1. State the theorem. Theorem 9.5: The supplement of an acute angle is an obtuse angle. 2. Draw a picture. Figure 9.6 shows an acute angle ABC and its supplement CBD. Together ABC and CBD form the straight angle ABD. Figure 9.6 ABC and CBD are supplementary angles. WebbPROVING STATEMENTS ABOUT ANGLES. A true statement that follows as a result of other statements is called a theorem. All theorems must be proved. We can prove a …

Geometry: Parallel Lines and Supplementary Angles - InfoPlease

Webb2. If two lines are cut by a transversal so that same-side interior angles are (congruent, supplementary, complementary), then the lines are parallel. 3. If two lines are cut by a transversal so that (alternate interior, alternate exterior, corresponding) angles are congruent, then the lines are parallel. 4. WebbProofs About Alternate Angles Parallel Lines and Supplementary Angles Using Parallelism to Prove Perpendicularity Proving Lines Are Parallel When you were given Postulate 10.1, you were able to prove several … ranoa

Proving Geometric Relationships

WebbPrepare a worksheet with several math problems on how to prove lines are parallel. For instance, students are asked to prove the converse of the alternate exterior angles … Webb22 nov. 2024 · When two angles (DAB and ABC) are supplementary to equal angles, the angles themselves are equal. ∠DAB = ∠ABC ∠ D A B = ∠ A B C Since AECD is a parallelogram, opposite angles are equal.... WebbTwo angles are called complementary when their measures add to 90 degrees. Two angles are called supplementary when their measures add up to 180 degrees. One way to avoid mixing up these definitions is to note that s comes after c in the alphabet, and 180 … dr moroianu