Chapter 3: Q4 (page 103)
Is the given figure a convex polygon, a non-convex polygon or neither?

Short Answer
The given figure is a non-convex polygon.
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Chapter 3: Q4 (page 103)
Is the given figure a convex polygon, a non-convex polygon or neither?

The given figure is a non-convex polygon.
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Classify each pair of angles as alternate interior, same side interior
or corresponding angles
and

State the postulate or theorem that justifies each statement.

Alan tried to prove Postulate 10 as shown below. However, he did not have valid proof. Explain why not.
If two parallel lines are cut by a transversal, then corresponding angles are congruent.
Given ; transversal cuts and
Prove:

Statement | Reason |
1. | Given |
2. | If two parallel lines are cut by transversal then alt. int. are |
3. | Vert. are |
4. | Transitive Property |
Exercises 23 – 29 refer to the diagram in Step 2 of Exercise 22
How many pairs of parallel planes are shown?
Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these.

and
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