Geometry Connections
Geometry Connections
Geometry Connections
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<strong>Geometry</strong> <strong>Connections</strong><br />
Lesson 2.1.4<br />
Name:<br />
Angles in a Triangle<br />
Review & Preview (Page 92)<br />
2-38 Find all missing angles in the diagrams below.<br />
a. b.<br />
75<br />
30<br />
85<br />
110<br />
2-39 Robert believes the lines graphed at right are perpendicular,<br />
but Mario is not convinced. Find the slope of each line, and<br />
explain how you know whether or not the lines are<br />
perpendicular.<br />
y<br />
x<br />
2-40 The diagram at right represents only half of a<br />
shape that has the graph of y 1 as a line of<br />
symmetry. Draw the completed shape, and<br />
label the coordinates of the missing vertices.<br />
<br />
y<br />
x
2-41 Janine measured the sides of a rectangle and found that the sides were 12 inches<br />
and 24 inches. Howard measured the same rectangle and found that the sides<br />
were 1 foot and 2 feet. When their math teacher asked them for the area, Janine<br />
said 288, and Howard said 2. Why did they get two different numbers for the<br />
area of the same rectangle?<br />
2-42 Graph this system of equations on graph paper. Then state the solution to the<br />
system. If there is not a solution, explain why.<br />
y 2 5 x 1<br />
y 2 5 x 2