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9. What are two straight lines that cross each other at a right angle?

A. Curved
B. Parallel
C. Perpendicular
D. Broken
10. In which one of the following pairs of angles are the angles always equal to each other?

A. Vertical
B. Complementary
C. Supplementary
D. Adjacent

Respuesta :

kudzordzifrancis

The Answer to 9 is

C perpendicular


EXPLANATION

Whenever two straight lines cross each other at right angles

[tex](90\degree)[/tex], we say they are perpendicular


The answer to  question 10  is

A. vertical



EXPLANATION


Two angles that are vertically opposite to each other are equal.

They also called X-angles


So from the diagram

[tex]a=b[/tex]


and


[tex]c=d[/tex]


Vertical angles are always equal






Ver imagen kudzordzifrancis
Ver imagen kudzordzifrancis
sweible2009

Answer:

9. I think the answer is Perpendicular

And i think 10. is Vertical

Step-by-step explanation:


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