魅影直播

Name the vertex and sides of $鈭�5$.

Theorem 1-1 states that two lines intersect at exactly one point. The diagram suggests what would happen if you tried to show two 鈥渓ines鈥� drawn through two points. State the postulate that makes this situation impossible.

For the following figure, name the vertex and sides of the angle $鈭�4$.

Copy and complete the table. Refer to the diagram on pages 1 and 2.

For the following symbols, find the symbols that represent a line, segment, ray, or length.

a. $\stackrel{炉}{PQ}$

b. $\stackrel{鈫�}{PQ}$

c. $\stackrel{鈫�}{PQ}$

d. $PQ$

Write three names for the line pictured.

A path between opposite vertices of the square is made up of hundreds of horizontal and vertical segments. (The diagram shows a simplified version.) What is the best approximation to the length of the path-24, 34, 44, or more than 44?

Can a given line be in two planes? In ten planes?

Classify each statement as true or false.

A, B, C, and D are coplanar.

State whether the angle appears to be acute, right, obtuse, or straight. Then estimate its measure.

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